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Published byAlban Oliver Modified over 9 years ago
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Crystal Shape: Cubic Fluorite
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Crystal Shape: Dodecahedron Garnet
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Crystal Shape: Hexagonal Prism - Quartz
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Crystal Shape: Octahedron Magnetite
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One Cleavage Plane Two Cleavage Planes at right angles Two Cleavage Planes not at right angles Three Cleavage Planes at right angles Three Cleavage Planes not at right angles
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Fracture No well defined cleavage planes Conchoidal Fracture
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Physical Properties Color and streak Luster: Intensity of light reflected off a mineral Metallic, non-metallic- glassy (vitreous) and earthy (dull)
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Physical Properties continued… Hardness: resistance to abrasion Mohs Scale (diagram below) Soft <2.5 fingernail will scratch mineral Hard >5.5 glass - mineral will scratch glass Medium 2.5 – 5.5 not scratched by fingernail and will not scratch glass
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Other Properties Taste Reaction with acid Specific Gravity The weight of a mineral compared to the same volume of water Magnetism
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