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1
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Tendency of some minerals to break along smooth planes
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2
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A fundamental component of matter which cannot be broken into simpler particles by ordinary chemical processes
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3
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How minerals break not along cleavage planes
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4
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The process by which one type of rock changes to another type of rock
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5
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Manner in which mineral reflects light
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6
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Type of rock formed by heat and pressure changing existing rocks
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10
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A solid aggregate composed of one or more minerals
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11
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Color of powder left on porcelain plate
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12
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A mineral mined for beauty
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14
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Resistance of a mineral to scratching
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15
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A inorganic solid with definite chemical composition and crystalline structure
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17
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Any substance whose atoms are arranged in a regular, periodically repeated pattern
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18
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Fragments of rock that make up sedimentary rocks
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19
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Many minerals contain impurities that change this
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