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Published byMyles Underwood Modified over 9 years ago
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Naturally Occurring Solid Crystal Structure Inorganic
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1. COLOR Most easily observed, but the least useful Many minerals have the same color/change color
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2. LUSTER : the way a mineral shines reflected light -Metallic -Nonmetallic
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Glassy look of glass Silky Look of parallel fibers Pearly Look of pearls, creamy Greasy Looks coated in oil Dull No sheen seen
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3. STREAK the color of the minerals powder (no matter the color, streak will always be the same)
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4. CLEAVAGE vs. FRACTURE Cleavage shows smooth flat surfaces forming if mineral is broken Fracture shows curved or rough surfaces if a mineral is broken
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5. DENSITY measure of how much matter is in a certain space Specific Gravity = weight of mineral divided by weight of equal volume of water
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6. HARDNESS is a minerals resistance to being scratched Mohs Hardness Scale 1 (soft) – 10 (hard)
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Special Properties Magnetism Fluorescence Double Refraction Radioactivity Chemical Reactions
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