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Chapter 4

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Across
3
Mineral that splits easily and evenly along one or more flat planes
5
A measure of how easily a mineral can be scratched
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Ratio of the mass of a substance to the mass of an equal volume of water at four degrees Celsius
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The way a mineral reflects light from its surface
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Solid in which the atoms are arranged in repeating patterns
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Valuable minerals that are prized for their rarity and beauty
Down
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Mineral that contains a valuable substance that can be mined at a profit
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Geometric solid having four sides that are equilateral triangles, resembling a pyramid
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Naturally occurring, inorganic solid with a specific chemical composition and a definite crystalline structure
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The color of a mineral when it is broken up and powdered
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Minerals that contain silicon and oxygen, and usually one or more elements
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Minerals that break with rough or jagged edges