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2
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This rock is found in granite, and is used in electrical insulators
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5
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A dark, hard, opaque rock that has a fine grained surface
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7
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This rock is made mostly of small minerals about the size of sand and rock grains
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8
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This hard, granular, crystalline rock is made of a combination of rocks
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9
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This rock forms from the sea, as it has coral, molluscs, and forams
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10
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This rock is the most abundant mineral and has very pale crystals
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12
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Very glass-like rock that forms in volcanoes
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14
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A soft rock formed from mud and clay
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1
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These rocks have been subjected to extremely heat and go through serious chemical changes
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3
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These rocks come below the ground. They have crystals that grow while they cool
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4
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This rock is white with streaks of color
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6
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This rock has a very crystal-like structure and is very abundant
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7
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These rocks form through accumulating sediments in the ground
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11
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The only rock known to float in water
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13
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A dark, fine-grained rock that forms in volcanoes
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