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

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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 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 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 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 3 273 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 3 274 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 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 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 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 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 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 copper Cu 2.5 3.0 8.5 9.0cubic octahedra, massive, arborescent 0 none hackly opaque red,brown tarnish metallic red 1 59 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 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 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 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 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 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 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 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 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 kaolinite Al2Si2O5(OH)4 2.0 2.5 2.6 2.6triclinic earthy 1 perfect conchoidal opaque white,grey,yellow dull white 4 108 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 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 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 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 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 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 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 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 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 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 sphalerite (Zn,Fe)S 3.5 4.0 3.9 4.2cubic massive cleavage pieces,crystals,rounded edges 6 perfect uneven transparent,translucent pale yellow,brown,black,red,green resinous lt yellow,red brown 3 177 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 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 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 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 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 206chondrodite (Mg,Fe)3(SiO4)(OH,F)2 6.0 6.5 3.1 3.1monoclinic us