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Minerals to Know
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mica Silicate Hardness: 2-3 Luster: pearly
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Feldspar Silicate Streak: white Hardness: 6
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quartz Color: variety Streak: colorless Hardness: 7 silicate
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calcite Fizzes with acid Common mineral found in all rock types
Carbonate Hardness 3
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Need to be able to recognize by observation
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Sulfur Hardness: Streak: white smell
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Magnetite Hardness: Streak: black Magnetic
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Graphite Luster: metallic Streak: black
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Pyrite Hardness: 6 Known as “fool’s gold” Luster: metallic
Streak: black with green tint
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Galena Streak: gray to black Hardness: 3
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Hematite Oxide Hardness: 5-6 Streak: rust red
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