Identifying Minerals
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Transcript of Identifying Minerals
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Identifying Minerals
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Pick your favorite mineral property
• Make a bumper sticker saying ie:
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Color
• caused by the presence of other trace elements.
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Luster• The way a mineral reflects light• Metallic• Glassy• Adamantine • Silky• Pearly • Pitchy • Waxy • Dull
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Texture
• Describes how a mineral feels to touchSmoothRoughRagged GreasySoapy
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Streak
• Color of a mineral when it is broken up and powdered.
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Hardness
• Measures how easily a mineral can be scratched.
• “Moh’s Hardness Scale”
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Cleavage and Fracture
• Atomic structure determines how a mineral will break.
• Minerals break along weak atomic bonds.
• Cleavage occurs if a mineral breaks along a plane (flat surface)
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Cleavage and Fracture
• Fracture occurs when minerals break with rough or jagged edges.
• Conchoidal fracture results in a circular pattern.
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Density and Specific Gravity
Density = Mass/Volume
Specific Gravity– Ratio of weight of a substance to the weight of an
equal volume of water at 4°C.
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Mineral uses
Ores– Contain a useful
substance that can be mined.
Ex: hematite mined for Fe, Bauxite for Al
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Mineral uses
Gems– Minerals that are prized
for their rarity and beauty.
– Rubies and Emeralds are more valuable than diamonds.
– YouTube - The Diamond process from the Mine to the Market
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Bumper Sticker
• I Dig Rocks…Check Out My Lustre• You Rock—Moh says you are a 10