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Naturally occurring Solid Inorganic Crystalline form Definite chemical composition.

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Presentation on theme: "Naturally occurring Solid Inorganic Crystalline form Definite chemical composition."— Presentation transcript:

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2 Naturally occurring Solid Inorganic Crystalline form Definite chemical composition

3 Luster Hardness Streak Color Crystal Cleavage/Fracture Other

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6 Field Test Try to scratch with Fingernail - if so, 2.5 if not, Try to scratch with Copper Penny – if so, 3 if not, Try to scratch with Steel Nail – if so, 5 if not, Try to scratch with Glass Plate – if so, 5.5 if not, Try to scratch with Streak Plate – if so, 7.5 if not, > 7.5 Scratch a mineral with either another mineral or field test materials. The harder mineral will leave a mark or cut into the softer mineral.

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9 Rub the mineral across the porcelain plate. The color left behind is the streak. Nonmetallic minerals and those that have a hardness greater than the streak plate will leave either white or no streak.

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11 Fracture

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14 Back

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17 Crystal (galena) (pyrite) (fluorite) (quartz) Twinning(staurolite) Twinning(staurolite) Fluorescense (fluorite) HCl Acid Reaction (calcite) Heft (galena) Magnetism (magnetite) Plasticity (mica) Smell (sulfur) Sound: actually a reaction to heat expansion (sulfur) Taste (halite) Touch (talc) (graphite) (kaolonite)

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