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14 Cards in this Set
- Front
- Back
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Azurite Deep Blue Hardness: 3.5 - 4 Sp. Gravity: 3.8 Cleavage: Not evident Fizz with HCl |
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Bornite "Peacock" - purplish-blue Hardness: 3 Sp. Gravity: 5 Cleavage: Not evident Heavy, often with calcopyrite |
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Calcite CaCO3 Usually white, but any color Hardness: 3 Sp. Gravity: 2.7 Cleavage: 3-D rhombohedral Strong fizz with HCL |
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Chalcopyrite CuFeS2 Metallic yellow Hardness: 3.5 - 4 Sp. Gravity: 4.2 Cleavage: none Softer, more yellow than pyrite |
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Dolomite CaMg(CO3)2 Many colors Hardness: 3.5 - 4 Sp. Gravity: 2.8 Cleavage: 3-D rhombohedral Weak fizz with HCL on powdered surface |
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Fluorite CaF2 Many colors Hardness: 4 Sp. Gravity: 3.2 Cleavage: 3-D octahedral Usually translucent |
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Galena PbS Metallic silver Hardness: 2.5 Sp. Gravity: 7.5 Cleavage: Cubic Soft, heavy |
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Graphite C Greasy-grey Hardness: 1 - 2 Sp. Gravity: 2.2 Cleavage: 1 direction Pencil-lead streak |
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Gypsum White or clear Hardness: 2 Sp. Gravity: 2.3 Cleavage: 3-D, not 90 Soft |
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Halite NaCl Clear or cloudy Hardness: 2.5 Sp. Gravity: 2.2 Cleavage: cubic Salty taste |
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Hematite Fe2O3 Red or gray Hardness: 5.5 Sp. Gravity: 5.3 Cleavage: none Red-brown streak |
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Magnetite Fe3O4 Metallic gray Hardness: 6 Sp. Gravity: 5.2 Cleavage: usually absent Magnetic, black streak |
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Pyrite FeS2 Shiney metallic pale yellow Hardness: 6 - 6.5 Sp. Gravity: 5 Cleavage: harder, less yellow than calcopyrite |
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Sphalerite ZnS Brown, yellow, black Hardness: 3 - 5.4 Sp. Gravity: 4.0 Cleavage: cubic semi-metallic resinous luster |
