Most commercially exploited metals are extracted from the ground as native elements.
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Q27: The color of a mineral in powdered
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Q39: Synthetically made glass and natural quartz crystals
Q42: Which common gemstone results from biomineralization?
A)diamonds
B)garnets
C)pearls
D)sapphires
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Q47: Minerals are classified into groups primarily on
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Q50: Gemstones are commonly found in pegmatites,which are
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