Category : Science and Education
Archive   : ROCKS2.ZIP
Filename : ADVANCED.DBF

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actinolite Ca2(Mg,Fe)5Si8O22(OH)2 5.0 6.0 2.9 3.2monoclinic prismatic, radiating, fibrous 2 perfect uneven opaque green,white,grey vitreous white 4 1 adamite Zn2(AsO4)(OH) 3.5 3.5 4.3 4.5orthorhombicsmall, many faceted prisms 2: 1 good, 1 poor uneven transparent colorless,white,yellow,green vitreous white 1 2 aegirite NaFe(Si2O6) 6.0 6.5 3.4 3.5monoclinic striated prisms, fibrous prismatic, distinct uneven opaque brown,black,green vitreous,resinous yellow,green 3 3 albite NaAlSi3O8 6.0 6.5 2.6 2.6triclinic tabular, often massive 3: 2 good, 1 poor uneven transparent,translucent,opaque white,grey,colorless vitreous,pearly white 4 4 allanite (Ce,Ca,Y)2(Al,Fe)3(SiO4)3(OH) 5.5 6.0 3.5 4.2monoclinic tabular, prismatic poor uneven opaque black,brown vitreous grey,green,brown 1 5 alunite KAl3(SO4)2(OH)6 3.5 4.0 2.6 2.8hexagonal rhombohedral, massive, earthy basal, good conchoidal opaque white,grey,red vitreous white 2 6 amblygonite (Li,Na)Al(PO4)(F,OH) 5.5 6.0 3.1 3.1triclinic rough crystals; compact or cleavable masses 4: 3 good, 1 perfect uneven transparent,translucent white,yellow,pink,green,blue vitreous,pearly white 3 7 anaclime NaAlSi2O6ù2H2O 5.0 5.5 2.2 2.3cubic earthy or radiating granular aggregates 0 none uneven transparent,translucent colorless,white,pink,yellow vitreous white 4 8 anatase TiO2 5.5 6.0 3.8 3.9tetragonal pyramids or tabular perfect basal uneven transparent,translucent,opaque brown,black,blue,red adamantine white,yellow 1 9 andalusite Al2SiO5 7.0 7.5 3.1 3.3orthorhombicgranular,massive,usually square cross section 2 good at 90ø uneven opaque,translucent white,pink,brown,grey vitreous white 3 10 andesine NaAlSi3O8 6.0 6.0 2.6 2.6triclinic commonly massive 3: 2 good at 90ø, 1 poor uneven opaque white,colorless,grey vitreous,pearly white 3 0 anglesite PbSO4 2.5 3.0 6.4 6.4orthorhombicprismatic, tabular, massive 2 good conchoidal transparent,translucent colorless,white adamantine white 2 11 anhydrite CaSO4 3.0 4.0 2.9 3.0orthorhombiccrystalline or massive 3 poor uneven transparent colorless,white,blue,grey vitreous white,yellow-green 2 12 anorthite (Na,Ca)AlSi3O8 6.0 6.5 2.7 2.7triclinic prismatic or massive 3: 2 good at 90ø, 1poor uneven transparent,translucent,opaque colorless,white,grey,green vitreous white 4 13 anthophyllite (Mg,Fe)7Si8O22(OH)2 5.5 6.0 2.8 3.2orthorhombiclamellar,fibrous needles, felted aggregates 1 perfect uneven translucent grey,light green,light brown vitreous white 2 14 antimony Sb 3.0 3.5 6.6 6.7hexagonal pseudocubic, tabular, massive 1 perfect uneven opaque grey white metallic grey 1 15 apatite Ca5(F,Cl,OH)(PO4)3 5.0 5.0 3.2 3.2hexagonal crystalline,massive,usually 6 sided crystals 1 poor conchoidal transparent,translucent,opaque green,blue green,yellow,blue,pink vitreous white 4 16 apophyllite KCa4Si8O2O(OH)ù8H2O 4.5 5.0 2.3 2.5tetragonal prismatic, foliated, massive 1 perfect uneven transparent,translucent white,tint vitreous,pearly white 2 17 aragonite CaCO3 3.5 4.0 2.9 2.9orthorhombicconcretionary,stalactitic,fibrous,radiating 3: 1 good, 2 poor uneven transparent,translucent colorless,white,yellow,reddish vitreous white 3 18 arfvedsonite Na2-3(Fe,Mg,Al)5Si8O22(OH,F)2 6.0 6.0 3.5 3.5monoclinic prismatic,tabular crystals;rodlike aggregates 2 perfect at 60ø & 120ø uneven opaque green black vitreous blue,grey 3 19 argentite Ag2S 2.0 2.5 7.0 7.3cubic distorted, crystals, massive 0 none conchoidal transparent,opaque colorless,white,yellow vitreous white,yellow 2 20 arsenic As 3.0 4.0 5.6 5.9hexagonal often granular or massive 1 perfect uneven opaque white, dark grey metallic grey 1 21 arsenopyrite FeAsS 5.5 6.0 5.9 6.2monoclinic prismatic or massive 1 good uneven opaque silver,grey metallic grey,black 2 22 atacamite Cu2Cl(OH)3 3.0 3.5 3.8 3.8orthorhombicprismatic, tabular, massive 1 perfect conchoidal transparent,translucent green,g-black adamantine,vitreous green 2 23 augite (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6 5.0 6.0 3.3 3.5monoclinic usually prismatic 2 good at 90ø uneven opaque black,green-black vitreous white,grey 4 24 autunite Ca(UO2)2(PO4)2ù10-12H2O 2.0 2.5 3.1 3.1orthorhombicpseudo tetragonal plates 1 perfect uneven translucent yellow,yellow-green pearly yellow 2 25 axinite Ca2(Fe,Mn)Al2(BO3)(Si4O12)(OH) 6.5 7.0 3.3 3.3triclinic sharp blades or massive 1 good conchoidal transparent,translucent brown,grey,blue,green vitreous white 3 26 azurite Cu3(CO3)2(OH)2 3.5 4.0 3.7 3.9monoclinic prismatic, tabular, massive 2 good conchoidal translucent,opaque deep blue vitreous pale blue 3 27 barite BaSO4 2.5 3.0 4.5 4.5orthorhombicplaty,tabular,massive,earthy,stalactic masses 3: 2 good at 80ø, 1 poor uneven transparent,translucent colorless,white,yellow,red,green vitreous white 3 28 beryl Be3Al2Si16O18 7.5 8.0 2.6 2.8hexagonal 6 or 12 sided prisms, massive 1 poor conchoidal transparent blue,yellow,green,pink,white,colorlessvitreous white 3 29 biotite K(Mg,Fe)2(Al,Fe)Si3O10(OH,F)2 2.5 3.0 2.7 3.1monoclinic tabular, foliated 1 perfect uneven transparent,translucent,opaque brown,black,green pearly white 4 30 bismuth Bi 2.0 2.5 9.7 9.8hexagonal pseudocubic, foliated, massive 1 poor earthy opaque silver white,pink-reddish metallic silver white 1 31 bismuthinite Bi2S3 2.0 2.0 6.4 6.5orthorhombicsmall needles, usually massive 1 poor conchoidal opaque grey metallic dark grey 2 32 boracite Mg3B7O13Cl 7.0 7.0 3.0 3.0cubic cubes, octahedra, or massive 2: 1 poor, 1 good conchoidal translucent colorless,white,yellow,green vitreous white 3 33 borax Na2B4O7ù10H2O 2.0 2.5 1.7 1.7monoclinic prismatic or massive 2: 1 poor, 1 good conchoidal transparent colrless,white vitreous white 2 34 bornite Cu5FeS4 3.0 3.0 4.9 5.3cubic usually massive 0 none conchoidal opaque brownish bronze,blue,purple metallic grey,black 2 35 bournonite PbCuSbS3 2.5 3.0 5.5 5.9orthorhombicoften twins, crystals or massive 3: 1 good, 2 poor conchoidal opaque grey,black metallic grey,black 2 36 brookite à-TiO2 5.5 6.0 4.2 4.9orthorhombictabular,crystals 3: 2 good, 1 poor uneven transparent,translucent yellow-brown,red,black adamantine,metallic white,yellow,brown 1 37 brucite Mg(OH)2 2.5 2.5 2.4 2.4hexagonal crystals,massive,fibrous 1 perfect uneven translucent white,blue,green,grey vitreous,pearly white 2 38 calcite CaCO3 3.0 3.0 2.7 2.7hexagonal rhombohedra, prisms, massive 3 perfect at 75ø conchoidal transparent,translucent,opaque colorless,white,tint vitreous white 4 39 carnallite KMgCl3ù6H2O 3.0 3.0 1.6 1.6orthorhombicusually massive or granular 0 none conchoidal transparent,translucent white,pink vitreous white 2 40 carnotite K2(UO2)2(VO4)2ù3H2O 1.0 1.0 4.7 5.0monoclinic earthy or powdery aggregates 1 perfect earthy opaque yellow earthy pale yellow 2 41 cassiterite SnO2 6.0 7.0 6.8 7.1tetragonal crystals, fibrous, massive 2 good conchoidal transparent,translucent,opaque brown,br-black adamantine white,yellow,light brown 2 42 celestite SrSO4 3.0 3.5 4.0 4.0orthorhombictabular, fibrous, granular 3: 1 perfect, 2 good conchoidal transparent,translucent white vitreous,pearly white 3 43 cerussite PbCO3 3.0 3.5 6.5 6.5orthorhombicprismatic, granular, massive 2 good conchoidal transparent,translucent white,grey adamantine,vitreous white 2 44 chabazite Ca(Al2Si4)O12ù6H2O 4.0 5.0 2.1 2.2hexagonal rhombohedral or massive 3 poor uneven transparent,translucent colorless,white,pink,yellow,brown vitreous white 3 45 chalcanthite CuSO4ù5H2O 2.5 2.5 2.1 2.3triclinic flat crystals, also massive 0 none conchoidal translucent blue vitreous pale blue 3 46 chalcocite Cu2S 2.5 3.0 5.7 5.8orthorhombicmassive 1 poor conchoidal opaque lead grey,black tarnish metallic dark grey 2 47 chalcopyrite CuFeS2 3.5 4.0 4.1 4.3tetragonal massive 1 poor conchoidal opaque brassy yellow metallic green-black 4 48 chlorite (Mg,Fe)6(AlSi3)O10(OH)8 2.0 2.5 2.6 3.3monoclinic 6 sided crystals,foliated,scales,compact,granular 1 perfect earthy,scaly transparent,translucent green,black vitreous,pearly colorless 4 49 chondrodite (Mg,Fe)3(SiO4)(OH,F)2 6.0 6.5 3.1 3.1monoclinic usually round grains, massive aggregates 1 poor uneven translucent yellow, red-brown vitreous,resinous white 3 50 chromite FeCr2O4 5.5 5.5 4.5 4.8cubic octahedral, usually massive 0 none uneven opaque black,brown metallic brown 3 51 chrysoberyl BeAl2O4 8.5 8.5 3.7 3.7orthorhombicprismatic, tabular, stellate 3: 1 good, 2 poor conchoidal transparent green,yellow-green,brown vitreous white 2 52 chrysocolla (Cu,Al)2H2Si2O5(OH)4ùnH2O 2.0 4.0 2.0 2.2amorphous botryoidal or earthy 0 none conchoidal translucent,opaque blue green,blue,green vitreous,earthy white,green-white 3 53 cinnabar HgS 2.0 2.5 8.0 8.2hexagonal rhombohedra, tabular, massive 3 perfect uneven translucent,opaque red,grey,brown adamantine,metallic red 2 54 clinozoisite Ca2Al3Si3O12(OH) 6.5 6.5 3.3 3.5monoclinic elongated crystals,striated;rodlike aggregates 1 perfect uneven transparent,translucent grey-white,pale green,pink vitreous white 3 55 cobaltite CoAsS 5.5 5.5 6.0 6.3cubic cube, pyritohedron, usually massive 1 perfect conchoidal translucent silver,reddish metallic grey 2 56 colemanite Ca2B6O11ù5H2O 4.0 4.5 2.4 2.4monoclinic clear prismatic crystals; also granular or massive2: 1 perfect, 1 good uneven transparent,translucent white,pink,red adamantine,vitreous white 2 57 columbite (Fe,Mn)(Nb,Ta)2O6 6.0 6.0 5.3 8.1orthorhombicprismatic or tabular crystals;twins;massive 1 good uneven opaque black, metallic black,dark red 2 58 copper Cu 2.5 3.0 8.5 9.0cubic octahedra, massive, arborescent 0 none hackly opaque red,brown tarnish metallic red 1 59 cordierite Mg2Al4Si5O18 7.0 7.5 2.6 2.7orthorhombicpseudohexagonal, massive, granular 1 poor uneven transparent,translucent blue,green,violet,yellow vitreous,dull white 2 60 corundum Al2O3 9.0 9.0 3.9 4.1hexagonal rhombohedral,also massive,crude 6-sided crystals 0 none conchoidal transparent,translucent,opaque brown,pink,blue,white,green,red adamantine,vitreous white 3 61 covellite CuS 1.5 2.0 4.6 4.6hexagonal hex plates, usually massive 1 perfect uneven opaque blue-black resinous black 2 62 cristobalite SiO2 6.0 7.0 2.3 2.3cubic octahedral 0 none conchoidal translucent white,colorless vitreous white 1 63 crocoite PbCrO4 2.5 3.0 5.9 6.1monoclinic prismatic, granular 3: 1 good, 2 poor conchoidal translucent red,orange vitreous orange yellow 1 64 cryolite Na3AlF 2.5 3.0 2.9 2.9monoclinic cuboidal crystals, usually massive 0 none uneven translucent red,brown,colorless,white,black vitreous,pearly white 1 65 cuprite Cu2O 3.5 4.0 5.8 6.1cubic octahedral, massive, or earthy 0 none conchoidal translucent,opaque red adamantine red-brown,shiny,yellow 2 66 danburite CaB2Si2O8 7.0 7.3 2.9 3.0orthorhombicclear prismatic crystals with wedge shaped ends 1 poor uneven transparent colorless, pale yellow vitreous white 2 67 datolite CaBSiO4(OH) 5.0 5.5 2.9 3.2monoclinic prismatic, massive, granular 0 none conchoidal transparent,translucent colorless,white,tint vitreous white 2 68 diamond C 10.010.0 3.5 3.5cubic cubes, octahedra, pebbles 4 perfect conchoidal transparent,translucent colorless adamantine grey 1 69 diaspore AlO(OH) 6.5 7.0 3.3 3.5orthorhombicusually as stalactitic or foliated aggregates 0 none earthy transparent,translucent pale pink,grey,green * white 2 70 diopside CaMgSi2O6 5.0 6.0 3.2 3.4monoclinic prismatic, massive, granular 2 good (87ø and 93ø) uneven transparent,translucent colorless,green,black,grey,yellow vitreous white,grey 4 71 dioptase CuSiO2(OH)2 5.0 5.0 3.2 3.3hexagonal rhombohedral, also massive 3 perfect conchoidal transparent,translucent emerald,green vitreous green 2 72 dolomite CaMg(CO3)2 3.5 4.0 2.8 2.9hexagonal rhombohedral, massive, granular 3 perfect at 74ø conchoidal transparent,translucent white,tint vitreous,pearly white,grey 4 73 dumortierite Al7(BO3)(SiO4)3O3 7.0 7.0 3.4 3.4orthorhombiccolumnar or fibrous radiating aggregates 2: 1 good, 1 poor uneven,hackly translucent blue,violet,red-brown vitreous white 2 74 enargite Cu3AsS4 3.0 3.5 4.4 4.4otrho usually massive or granular 3: 2 good, 1 poor uneven opaque grey,black,steel metallic black 2 75 enstatite Mg2Si2O6 5.5 6.0 3.2 3.9otrho prismatic, also massive 2 good uneven translucent,opaque grey,green,yellow,brown,black vitreous,pearly grey,white 4 76 epidote Ca2(Al,Fe)3Si3O12(OH) 6.0 7.0 3.3 3.5monoclinic elongated crystals, granular 1 perfect uneven translucent,opaque yellow green,black green vitreous grey 3 77 epsomite MgSO4ù7H2O 2.0 2.5 1.7 1.7orthorhombicprismatic, usually massive, fibrous 2: 1 perfect, 1 good conchoidal transparent,translucent colorless,white vitreous white 3 78 erythrite Co3(AsO4)2ù8H2O 1.5 2.5 3.0 3.0monoclinic radiating aggregates,earthy masses and crusts 1 perfect earthy transparent,translucent red,grey vitreous,pearly red 1 79 euclase BeAlSiO4(OH) 7.5 8.0 3.1 3.1monoclinic prismatic 1 perfect conchoidal transparent,translucent colorless,green,blue,yellow,white vitreous white 2 80 ferberite FeWO4 - MnWO4 5.0 5.5 7.1 7.5monoclinic prismatic, tabular, bladed, massive 1 perfect uneven translucent,opaque red-brown,black metallic,dull dark brown 2 81 fluorite CaF2 4.0 4.0 3.0 3.3cubic cubes etc, also granular 4 perfect conchoidal transparent,translucent purple,colorless,green,yellow,blue,redvitreous white 4 82 franklinite (Zn,Mn,Fe)(Fe,Mn)2O4 * 6.0 6.5 5.0 5.2cubic octahedral, granular, massive 0 none uneven opaque steel black metallic black,brown,red brown 1 83 galena PbS 2.5 2.5 7.2 7.6cubic cube, octahedra, massive 3 perfect at 90ø sub-conchoidal opaque grey metallic grey 4 84 garnet A3B2(SiO4)3 6.0 8.0 3.4 4.2cubic various beads,massive,crystals w/12 diamond faces 0 none uneven transparent,translucent,opaque violet,red,yellow,green,black resinous,vitreous white 2 85 garnierite (Ni,Mg)6Si4O10(OH)8 3.0 4.0 2.2 2.8amorphous massive or earthy 0 none earthy opaque white,green,blue dull green-white 3 86 glauberite Na2Ca(SO4)2 2.5 3.0 2.8 2.8monoclinic tabular,prismatic;compact masses and crusts 1 perfect uneven transparent,translucent white,yellowish,red vitreous,greasy white 1 87 glauconite (K,Na)(Al,Fe,Mg)2(Al,Si)4O10(OH)2 * 2.0 2.2 2.5 2.8monoclinic amorphous, granular or earthy 0 none earthy translucent,opaque blue green dull,greasy green 2 88 glaucophane Na2(Mg,Fe)3Al2Si8O22(OH)2 6.0 6.5 3.0 3.3monoclinic prisms, fibrous, granular, massive 2 perfect uneven translucent blue,black,green vitreous,pearly blue-grey,white 2 89 goethite FeO(OH) 5.0 5.5 4.0 4.4orthorhombicprisms, tabular, massive, fibrous, earthy 1 perfect uneven translucent,opaque brown,black,yellow,red adamantine brown,yellow 3 90 gold Au 2.5 3.0 15.3 19.3cubic cubes, usually massive, arborescent 0 none hackly opaque yellow-gold metallic yellow 1 91 graphite C 1.0 2.0 2.1 2.3hexagonal usually scaly, massive, granular, earthy 1 perfect uneven opaque black metallic,dull black 2 92 greenockite CdS 3.0 3.5 4.9 5.0hexagonal hemimorphic crystals, crusts 1 good conchoidal translucent yellow,y-orange adamantine,resinous red,orange 1 93 gypsum CaSO4ù2H2O 1.5 2.0 2.3 2.3monoclinic prisms, stellate, granular, fibrous 3 1 perfect, 2 good conchoidal transparent,translucent colorless,white,grey,yellow pearly white 4 94 halite NaCl 2.0 2.5 2.2 2.2cubic cubes, octahedra, massive, granular 3 perfect at right anglesconchoidal transparent,translucent colorless,white,tint vitreous white 4 95 harmotome (Ba,K)(Al,Si)2Si6O16ù6H20 4.0 4.5 2.3 2.5monoclinic always cruciform twins 1 poor uneven translucent white,grey,yellow,red vitreous white 2 96 hausmannite Mn2O4 * 5.5 5.5 4.7 4.8tetragonal pyramidal, massive, granular 1 good uneven translucent,opaque grey,blue,brown-black metallic,vitreous brown 1 97 hauyne (Na,Ca)4-8(Al6Si6)O24(SO4,S)1-2 5.5 6.0 2.3 2.4cubic crystal beads, granular 3 perfect conchoidal transparent,translucent blue,grey,green,red,yellow vitreous,resinous white,pale blue 2 98 hematite Fe2O3 5.5 6.5 5.2 5.3hexagonal massive,earthy,rhombohddedral,scaly or fibrous 0 none uneven opaque tin,steel,red metallic,earthy red,red-brown 4 99 hemimorphite Zn4Si2O7(OH)2ùH2O 4.5 5.0 3.3 3.5orthorhombichemimorphic, massive, granular crusts 1 perfect uneven transparent,translucent,opaque white,yellow,brown,green vitreous white 2 100 heulandite (Na,Ca)4-6Al6(Al,Si)4Si26O72ù24H2O 3.5 4.0 2.2 2.2monoclinic tabular, globular masses 1 perfect uneven transparent,translucent white,red,brown vitreous,pearly white 3 101 hornblende (Ca,Na)2-3(Mg,Fe,Al)5(Al,Si)8O22(OH)2 * 5.0 6.0 2.9 3.4monoclinic prismatic, bladed, fibrous, massive, granular 2 perfect (56ø & 124ø) uneven opaque black,green,brown-black vitreous pale: grey,green,brown-black 4 102 hydrozincite Zn5(CO3)2(OH)6 2.0 2.5 3.6 3.8monoclinic usually massive, fibrous, crusts 1 perfect uneven opaque colorless,white,pale yellow dull,silky white 1 103 ilmenite FeTiO3 5.0 6.0 4.5 5.0hexagonal very flat,tabular crystals;compact,granular aggrg.0 none conchoidal opaque black,dark brown sub metallic black,brown-red 1 104 iron Fe 4.0 5.0 7.3 7.9cubic usually scales, plates, grains 3 perfect hackly opaque steel grey,black metallic grey 1 105 jadeite Na(Al,Fe+3)Si2O6 6.5 7.0 3.2 3.5monoclinic usually massive (jade) 2 good (87ø and 93ø) splintery translucent,opaque green,white,pale violet vitreous,pearly white 1 106 jasper SiO2 7.0 7.0 2.5 2.6hexagonal cryptocrystalline silica 0 none conchoidal opaque red,brown,yellow,green,blue,black dull white 1 107 kaolinite Al2Si2O5(OH)4 2.0 2.5 2.6 2.6triclinic earthy 1 perfect conchoidal opaque white,grey,yellow dull white 4 108 kernite Na2B4O7ù4H2O 2.5 2.5 1.9 1.9monoclinic elongated,striated crystals;cleavable masses 3: 2 perfect, 1 good splintery translucent,opaque colorless,white vitreous,pearly white 3 109 kyanite Al2SiO5 5.0 7.0 3.5 3.7triclinic prismatic, bladed 2: 1 perfect, 1 good splintery transparent,translucent,opaque blue,white pearly white 3 110 labradorite (Na,Ca)AlSi3O8 6.0 6.0 2.7 2.7triclinic tabular, usually massive 3: 2 good, 1 poor conchoidal translucent,opaque grey-brown vitreous white 4 111 laumontite Ca(Al2Si4)O12ù4H2O 3.5 4.0 2.2 2.4monoclinic prismatic, fibrous, columnar 2 perfect uneven transparent,translucent white,red,yellow,blue vitreous,pearly white 4 112 lazulite MgAl2(PO4)2(OH)2 5.0 6.0 3.0 3.1monoclinic pyramidal, massive, granular 1 good uneven translucent,opaque blue vitreous white 1 113 lazurite (Na,Ca)8(Al,Si)12O24(S,SO4) 5.0 5.3 2.4 2.4cubic compact,massive 6 poor uneven translucent blue,blue green vitreous white,light blue 1 114 lepidolite K(Li,Al)3(Si,Al)4O10(F,OH)2 2.5 4.0 2.8 2.9monoclinic usually scaly or granular masses 1 perfect uneven translucent red,violet,white pearly white 3 115 leucite KAlSi2O6 5.5 6.0 2.4 2.6cubic cubic form, tetra properties 0 none conchoidal translucent,opaque white,grey,colorless vitreous,resinous white 4 116 magnesite MgCo3 3.5 4.0 3.0 3.0hexagonal usually massive or fibrous 3 perfect conchoidal transparent,translucent,opaque white,grey-white,yellow,brown vitreous white 3 117 magnetite Fe3O4 5.5 6.5 5.0 5.2cubic octahedra, massive, granular 4 poor uneven opaque steel,brown-black metallic,dull black 4 118 malachite Ci2(CO3)(OH)2 3.5 4.0 3.9 4.0monoclinic usually fibrous masses, granular, earthy 1 perfect conchoidal transparent,translucent,opaque green silky,vitreous pale green 3 119 manganite MnO(OH) 4.0 4.0 4.2 4.4orthorhombicprismatic, aggregates, columnar 1 perfect uneven translucent,opaque steel grey,black metallic,vitreous dark,red-brown 2 120 marcasite FeS2 6.0 6.5 4.8 4.9orthorhombictabular, aggregates, nodules 2 good uneven opaque brassy yellow metallic grey black 3 121 margarite CaAl2(Al2Si2))O10(OH)2 3.5 4.5 2.9 3.1monoclinic foliated or lamellar aggregates 1 perfect uneven transparent,translucent pale pink,white,grey pearly white 3 122 mercury Hg 0.0 0.0 13.6 13.6.. liquid globules 0 none none opaque silver metallic 1 123 microline KAlSi3O8 6.0 6.5 2.5 2.5triclinic prismatic,granular,blocky 2 good at right angles uneven translucent,opaque white,tint,green vitreous white 4 124 millerite NiS 3.0 3.5 5.3 5.6hexagonal needles, fibrous, massive 2 perfect uneven opaque brassy yellow metallic green-black 1 125 mimetite Pb5(AsO4)3Cl 3.5 3.5 7.0 7.3hexagonal trigonal, botryoidal, crusts 0 none uneven translucent pale yellow,brown,white resinous white 2 126 molybdenite MoS2 1.0 1.5 4.7 4.8hexagonal usually foliated, massive 1 perfect uneven opaque steel grey,blue tint metallic grey black 2 127 monazite (Ca,La,Nd,Th)PO4 5.0 5.5 4.8 5.3monoclinic tabular, twins, massive, sandy 1 good conchoidal opaque pale yellow,dark red-brown resinous white 3 128 muscovite KAl2(AlSi3)O10(OH)2 2.0 2.5 2.8 3.0monoclinic pseudohexagonal plates, massive 1 perfect uneven transparent,translucent white,yellow,green,silverish pearly white 4 129 natrolite Na2(Al2Si3)O10ù2H2O 5.0 5.5 2.2 2.4orthorhombicprismatic, acicular, radial aggregates, 1 perfect conchoidal transparent,translucent white,yellow,pink vitreous,pearly white 3 130 nephiline (Na,K)AlSiO4 5.5 6.0 2.6 2.6hexagonal prismatic, aggregates, massive 3 poor conchoidal transparent,translucent white,colorless,pale grey resinous,vitreous white 4 131 niccolite NiAs 5.0 5.5 7.3 7.8hexagonal usually irregular masses, botryoidal 0 none conchoidal opaque copper-red,grey,(black tarnish) metallic brown-black 2 132 oligoclase (Na,Ca)AlSi3O8 6.0 6.5 2.6 2.6triclinic platy,tabular,blocky,massive 1 perfect conchoidal translucent,opaque white,green,red,grey,yellow vitreous,pearly white 4 133 olivine (Mg,Fe)2SiO4 6.5 7.0 3.3 3.3orthorhombicgranular,prismatic, tabular 2 poor conchoidal transparent,translucent green,yellow-green vitreous white 4 134 opal SiO2ùnH2O 5.5 5.5 1.8 2.2amorphous reniform, stalactitic, massive 0 none conchoidal translucent,opaque colorless,white,yellow,red,blue,green resinous,pearly white 3 135 orpiment As2S3 1.5 2.0 3.4 3.5monoclinic prismatic, usually massive crusts 1 perfect uneven translucent yellow resinous,pearly yellow 2 136 orthoclase KAlSi3O8 6.0 6.0 2.5 2.6monoclinic prismatic, tabular, granular masses 2 good at 90 ø conchoidal transparent,translucent,opaque white,grey,tint vitreous,pearly white 3 137 pectolite NaCa2Si3O8(OH) 5.0 5.0 2.8 2.9triclinic fibrous or radiating spherical aggregates 2 perfect splintery translucent white,grey vitreous,silky white 2 138 penninite Mg3(Si4O10)(OH)2ùMg3(OH)6 2.5 2.5 2.6 2.8monoclinic pseudohexagonal, massive 1 perfect uneven transparent,translucent green,blue green pearly pale green 2 139 pentlandite (Fe,Ni)9S8 3.0 3.5 4.6 5.0cubic usually granular or massive 0 none conchoidal opaque bronze-yellow metallic brown,black 2 140 petalite LiAlSi4O10 6.0 6.5 2.4 2.4monoclinic tabular or columnar crystals 1 perfect uneven transparent,translucent white,grey,colorless vitreous,pearly white 3 141 phenakite Be2SiO4 7.5 8.0 3.0 3.0orthorhombicpseudohexagonal crystals 1 poor conchoidal transparent colorless,pale-yellow,pink vitreous white 1 142 phillipsite (K2,Na2Ca)(Al2Si4)O12ù4-5H2O 4.0 4.5 2.2 2.2monoclinic prismatic cruciform twins, radial aggreg 1 perfect uneven translucent white,yellow,grey,red vitreous white 3 143 phlogopite K(Mg,Fe)3(AlSi3)O10(F,OH)2 2.5 3.0 2.8 2.8monoclinic tabular, laminar, scales 1 perfect uneven transparent,translucent colorless,brown,red,white pearly white 4 144 plagioclase Na(AlSi3O8) 6.0 6.0 2.6 2.7triclinic common rock forming mineral 3: 2 good at 90ø,1 poor uneven transparent,translucent colorless,white,grey,green,blue,red vitreous,pearly white 4 145 platinum Pt 4.0 4.5 21.5 21.5cubic usually granular 0 none hackly opaque steel grey,silver metallic silver grey 1 146 polybasite (Ag,Cu)16SbS11 2.0 3.0 6.0 6.2monoclinic tabular crystals,beveled edges,triangular growths 1 poor uneven opaque steel grey,iron black metallic black 1 147 polyhalite KaCa2Mg(SO4)4ù2H2O 3.0 3.5 2.8 2.8triclinic prismatic, usually platy or fibrous 1 good conchoidal translucent red,white,yellow,green vitreous,resinous white,pink 1 148 prehnite Ca2Al2Si3O10(OH)2 6.0 6.5 2.8 3.0orthorhombichemimorphic tabular, radial aggregates 1 good uneven transparent,translucent green,y-green,yellow,colorless,white vitreous,pearly white 3 149 proustite Ag3AsS3 2.0 2.5 5.0 6.0hexagonal hemimorphic, granular, usually massive 1 good conchoidal translucent red adamantine red 1 150 psilomelane BaMnO16(OH)4 * 5.0 6.0 3.7 4.7amorphous massive, botryoidal, stalactilic 0 none uneven opaque black,brown metallic,dull brown-black,shiny,yellow 2 151 purpurite (Mn,Fe)PO4 * 4.0 4.5 3.3 3.3orthorhombicprismatic or massive 1 good uneven opaque purple silky purple,blue 1 152 pyragyrite Ag3SbS3 2.5 3.0 5.9 5.9hexagonal hemimorphic prisms, massive 1 good conchoidal translucent,opaque dark,red,blue-grey,black metallic,adamantine red 1 153 pyrite FeS2 6.0 6.5 5.0 5.2cubic striated cubes, massive, nodular 0 none conchoidal opaque brassy brown,yellow metallic green-black 4 154 pyrolusite MnO2 2.0 2.5 4.8 4.8orthorhombicusually fibrous, massive, earthy 2 perfect uneven opaque steel,dark-grey,black mettalic,submetallicblack 2 155 pyromorphite Pb5(PO4)3Cl 3.5 4.0 6.5 7.1hexagonal trigonal prisms, aggregates, crusts 0 none uneven translucent green,yellow,brown,blue,red resinous white,yellow 3 156 pyrophyllite A12Si4O10(OH)2 1.0 2.0 2.7 2.9orthorhombictabular, foliated, radial aggregates 1 perfect uneven translucent white,green,grey,brown,yellow pearly white 2 157 pyrrhotite FeS 3.5 4.5 4.6 4.6hexagonal tabular, foliated, massive, granular 0 none uneven opaque brassy brown,yellow metallic dark grey 3 158 quartz à-SiO2 7.0 7.0 2.6 2.7hexagonal prismatic,6 sided crystals,massive 0 none conchoidal transparent,translucent,opaque colorless,white,blue,green,yellow,red vitreous,resinous white 4 159 realgar AsS 1.5 2.0 3.5 3.6monoclinic prisms, needles, massive, granular 1 good conchoidal translucent red,orange resinous,adamantine red,orange 2 160 rhodocrosite MnCO3 3.5 4.5 3.5 3.6hexagonal usually massive, globular, crusts 3 perfect uneven translucent pink,red,yellow,dark brown vitreous,pearly white,pink 3 161 rhodonite (Mn,Fe,Mg)SiO3 5.5 6.5 3.4 3.6triclinic large tabular crystals, massive 2 good uneven transparent,translucent,opaque red,brown,green,yellow,black vitreous white 2 162 rutile à-TiO2 6.0 6.5 4.4 4.3tetragonal prisms, twins, massive, granular 3: 2 good, 1 poor uneven translucent,opaque brown,black,red metallic,adamantine pale yellow,green 2 163 scapolite (Na,Ca,K)4A13(Al,Si)3Si6O24(Cl,SO4,CO3) 5.0 6.0 2.5 2.8tetragonal prismatic, massive, granular 2 good conchoidal translucent,opaque white,yellow,pink vitreous,pearly white 3 164 scheelite CaWO4 4.5 5.0 5.9 6.1tetragonal pyramidal, granular, massive 3: 1 good, 2 poor uneven transparent,translucent pale green,yellow adamantine,resinous white 2 165 scolecite Ca(Al2Si3)O10ù3H2O 5.0 5.5 2.2 2.4monoclinic prismatic, radiating, fibrous 1 good uneven transparent,translucent white vitreous,silky white 3 166 scorodite FeAsO4ù2H2O 3.5 4.0 3.3 3.3orthorhombicpyramidal,tabular,prismatic 0 none conchoidal translucent colorless,green,blue,brown,yellow vitreous,adamantine white 2 167 sepiolite Mg4Si6O15(OH)2ù6H2O 2.0 2.5 2.0 2.0orthorhombiccompact, fine textured; sometimes earthy looking 0 none conchoidal opaque white,yellowish earthy white 3 168 serpentine Mg6(Si4O10)(OH)8 3.0 4.0 2.5 2.6monoclinic massive, granular, foliated, fibrous 0 none conchoidal translucent,opaque green,yellow,brown,black,red resinous,dull white 4 169 siderite FeCO3 3.5 4.5 3.7 3.9hexagonal rhombohedral, massive, granular 3 perfect uneven translucent,opaque yellow,brown,bred,black pearly,vitreous white 4 170 sillimanite A;2SiO5 6.0 7.0 3.2 3.2orthorhombicacicular, massive, foliated, nodular 1 perfect uneven transparent,translucent grey-green,grey-yellow,brown vitreous white 3 171 silver Ag 2.5 3.0 9.6 12.0cubic cube, usually massive arborescent 0 none hackly opaque silver-white metallic brilliant silver 1 172 skutterudite CoAs2-3 6.0 6.0 6.5 6.8cubic small, cubic or octahedral metallic like crystals 2 good uneven opaque tin white,silver grey metallic black 1 173 smithsonite ZnCO3 5.0 5.5 4.0 4.5hexagonal usually massive, granular, earthy 3 perfect uneven translucent,opaque white,grey,green,brown vitreous,pearly white 3 174 sodalite Na4Al3(SiO4)3Cl 5.0 6.0 2.2 2.4cubic dodecahedral, massive 6 perfect conchoidal transparent,translucent blue,colorless,grey,yellow,red vitreous,resinous white 3 175 sperrylite PtAs2 6.0 7.0 10.6 10.6cubic cubes, cube and octahedron 0 none conchoidal opaque steel grey metallic black 1 176 sphalerite (Zn,Fe)S 3.5 4.0 3.9 4.2cubic massive cleavage pieces,crystals,rounded edges 6 perfect conchoidal transparent,translucent pale yellow,brown,black,red,green resinous lt yellow,red brown 3 177 sphene CaTiO(SiO4) 5.0 5.5 3.5 3.5monoclinic wedge shapes, twins, massive 1 good conchoidal transparent,translucent,opaque yellow,green,brown,black adamantine,resinous white 3 178 spinel MgAl2O4 7.5 8.0 3.5 4.1cubic octahedra, twins, granular 0 none conchoidal transparent,translucent,opaque white,red,blue,green,brown,black vitreous white 3 179 spodumene LiAlSi2O6 6.5 7.0 3.1 3.2monoclinic 8 sided prisms, massive 1 good splintery transparent,translucent violet,pink,yellow,green vitreous,pearly white 3 180 staurolite (Fe,Mg,Zn)2Al9Si4O23(OH) 7.0 7.5 3.7 3.8orthorhombic6-sided prisms, often twins 1 poor conchoidal translucent,opaque brown,black vitreous,resinous white,grey 3 181 stephanite Ag5SbS4 2.0 2.5 6.3 6.3orthorhombicmassive,disseminated;prismatic,tabular crystals 2 good sub-conchoidal opaque iron black metallic iron black 2 182 stibnite Sb2S3 2.0 2.0 4.6 4.7orthorhombicneedles, radial aggregates, fibrous, massive 1 perfect conchoidal opaque lead grey,black metallic grey black 3 183 stilbite NaCa2(Al5Si13)O36ù14H2O 3.5 4.0 2.2 2.2monoclinic tabular, twins, aggregates 1 perfect uneven transparent,translucent colorless,white,yellow,brown,red vitreous,pearly white 3 184 strontianite SrCO3 3.3 4.0 3.6 3.7orthorhombicprismatic, needles, fibrous, granular 3 perfect uneven transparent,translucent pale green,yellow,grey,white vitreous,resinous white 1 185 sulfur S 2.0 2.0 1.9 2.1orthorhombicbipyramids, granular, fibrous, nodular 2 poor conchoidal transparent,translucent yellow,brown resinous pale yellow 2 186 sylvanite AgAuTe4 1.5 2.0 8.0 8.3monoclinic stubby,prismatic crystals;skeletal rock deposits 1 perfect uneven opaque silver white metallic grey 1 187 sylvite KCl 2.0 2.0 2.0 2.0cubic cubic,octahedral crystals;compact,granular masses 1 perfect uneven transparent red,white,colorless vitreous white 1 188 talc Mg3Si4O10(OH)2 1.0 1.0 2.7 2.8monoclinic usually granular, massive or scaly 1 perfect uneven transparent,translucent,opaque green,grey,white pearly white 4 189 tetrahedrite (Cu,Fe)12Sb4Si3 - (Cu,Fe)12As4S13 3.0 4.5 4.4 5.4cubic tetrahedral, massive, granular 0 none uneven translucent,opaque grey black metallic black,brown,red 2 190 thenardite Na2SO4 2.5 3.0 2.7 2.7orthorhombicclusters,granular,massive,tabular 1 perfect uneven,hackly transparent,translucent white,brownish,grey vitreous white 2 191 topaz Al2SiO4(F,OH)2 8.0 8.0 3.4 3.6orthorhombicstriated prisms or massive 1 perfect uneven transparent,translucent,opaque colorless,yellow,pink,blue,green vitreous white 3 192 tourmaline (Na,Ca)(Al,Fe,Li,Mg)3A16(BO3)3(Si6O18)* 7.0 7.5 3.0 3.2hexagonal trigonal prisms, massive 0 none uneven transparent,translucent,opaque brown,black,red,pink,green,blue,yellowvitreous white 3 193 tremolite Ca2Mg5Si8O22(OH)2 5.5 6.0 2.9 3.1monoclinic prisms, bladed, fibrous, massive 2 perfect splintery transparent,translucent colorless,white,grey,green vitreous white 4 194 trydimite á-SiO2 6.5 7.0 2.3 2.3hexagonal plates, often twins 0 none uneven transparent,translucent colorless,white waxy white 1 195 turquoise CuAl6(PO4)4(OH)8ù5H2O 5.0 6.0 2.6 2.9triclinic usually massive, stalactitic, crusts 0 none conchoidal translucent,opaque blue,blue green,grey-green waxy white,pale green 2 196 ulexite NaCaB5O9ù8H2O 1.0 2.0 2.0 2.0triclinic light,spongy,rounded masses; fine fibers 2: 1 perfect, 1 good uneven transparent white silky white 2 197 uraninite UO2 5.5 5.5 10.9 10.9cubic usually granular masses;cubic,dodecahedral crystal0 none conchoidal opaque steel black sub metallic brown-black 2 198 vanadinite Pb5(VO4)3Cl 3.0 3.0 6.7 7.1hexagonal trigonal pyramids, aggregates, crusts 0 none uneven transparent,translucent red,brown,yellow resinous white,yellow 2 199 vesuvianite Ca10(Mg,Fe)2Al4(SiO4)5(SiO7)2(OH)4 6.5 6.5 3.3 3.5tetragonal prismatic, massive, granular 0 none uneven transparent,translucent green-brown,red,yellow vitreous white 3 200 vivianite Fe3(PO4)2ù8H2O 1.5 2.5 2.6 2.7monoclinic small prisms, aggregates, crusts 1 perfect splintery transparent,translucent blue,green,white,colorless pearly,vitreous pale blue 2 201 wavellite Al3(PO4)2(OH)3ù5H2O 3.5 4.0 2.3 2.3orthorhombicusually globular aggregates, crusts 3: 1 perfect, 2 good uneven translucent white,green,brown,yellow vitreous,pearly white 1 202 willemite Zn2SiO4 5.5 5.5 4.0 4.0hexagonal compact,granular or massive 2 good uneven translucent colorless,brown,red,yellow-brown,blackvitreous,resinous white 1 203 witherite BaCO3 3.5 3.5 4.3 4.4orthorhombicprismatic twins, massive, granular 1 good uneven translucent white,yellow,grey vitreous,resinous white 1 204 woolastonite CaSiO3 4.5 5.0 2.8 2.9monoclinic tabular, massive, lamellar 2 perfect uneven translucent white,grey,yellow,brown pearly,vitreous white 2 205 wulfenite PbMoO4 3.0 3.0 6.3 6.7tetragonal massive,granular,various or flat tabular crystals 3 poor uneven transparent,translucent yellow,red,orange resinous,adamantine white,pale yellow 2 206 zincite (Zn,Mn)O 4.5 5.0 5.4 5.7hexagonal massive, granular or foliated 1 perfect conchoidal transparent,translucent red adamantine orange 1 207 zircon ZrSiO4 7.0 7.5 3.9 4.8tetragonal prisms and pyramid, small grains 2 poor conchoidal transparent,translucent,opaque colorless,brown,grey,green,red adamantine white 3 208 zoisite Ca2Al3(Si3O12)(OH) 6.0 6.5 3.3 3.4orthorhombiclong prisms, massive, fibrous 1 good uneven transparent,translucent white,colorless,grey,green,brown,red vitreous white 1 209