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27 Cards in this Set
- Front
- Back
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Galena |
Hardness: 2.5 -Metallic Silver -Very dense, grey/black streak Composition: PbS |
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Magnetite |
Hardness: 5.5-6.5 -Black to Silver -attracted by magnet -black streak Composition: FeS2 |
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Pyrite |
Hardness: 6.5 -Brassy Yellow -Green-black streak -Cubic Crystals |
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Graphite |
Hardness:1-2 -Sliver to Grey -Black streak, Greasy Feel Composition: C |
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Hematite |
Hardness:1-6.5 -Metallic Silver or Earthy Red -red-brown streak -Fe2O3 |
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Talc
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Hardness:1 White to Green -Greasy feel Composition: |
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Sulfur
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Hardness: 2 -Yellow to Amber -Easily Melted, Smells like sulfur Composition: S |
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Gypsum
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Hardness: 2 -White to Pink or grey -easily scratched by fingernail |
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Muscovite Mica
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Hardness: 2-2.5 -Colorless to Yellow -Flexible in thin sheets |
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Halite
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Hardness: 2.5 -Colorless to White -cubic cleavage -salty taste NaCi |
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Biotite Mica |
Hardness: 2.5-3 -black to dark brown -flexible in thin sheets |
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Calcite |
Hardness: 3 -colorless or variable -bubbles with acid |
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Dolomite |
Hardness: 3 -colorless or variable -bubbles with acid when powdered |
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Fluorite |
Hardness: 4 -Colorless to variable -cleaves in 4 directions |
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Pyroxene |
Hardness: 5-6 -black to dark green -cleaves in two directions |
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Amphiboles |
Hardness: 5.5 -black to dark green -cleaves at 56 and 124 |
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Potassium Feldspar |
Hardness: 6 -white to pink -cleaves in 2 directions at 90 |
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Plagioclase Feldspar |
Hardness: 6 -white to grey -cleaves in 2 directions, striations visible |
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Olivine |
Hardness: 6.5 -green to dark brown -commonly light green and granular |
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Quartz |
Hardness: 7 -colorless to variable -glassy luster, may form hexagonal crystals |
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Garnet |
Hardness: 7 -dark red to green -glassy luster, often seen as red grains in metamorphic rocks |
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Sphalerite |
-pale color streak -resinous luster -sulfurous odor -six cleavages |
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Chalcopyrite |
Brassy yellow softer than glass more yellow than pyrite |
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Limonite |
yellow brown streak |
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Bauxite |
Earthy plastic, pisolitic structure |
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kaolinite |
white pure variety of clay |
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Chlorite |
green soft low grade metamorphic |
