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1
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"Primary Rock Group","Secondary Rock Group","Color","Texture","Constituents"
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2
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"Igneous","Granite","pink, gray, white, black","crystaline, coarse granular","quartz, feldspar, mica"
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3
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"Igneous","Basalt","gray, black","fine granular","olivine, pyroxene, plagioclase feldspar"
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4
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"Igneous","Obsidian","black","smooth glassy","silica (SiO2), trace elements"
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5
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"Igneous","Pumice","gray","foamy, sharp edges","silica (SiO2), water vapor"
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6
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"Igneous","Rhyolite","gray, pink","fine granular, vesiclar","quartz, feldspar, mica"
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7
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"Igneous","Gabbro","gray, black","coarse granular","pyroxene, olivine"
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8
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"Sedimentary","Limestone","grey","fine granular, smooth","calcium carbonate (CaCO3), organic matter"
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9
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"Sedimentary","Sandstone","beige, brown, red ochre, yellow ochre","coarse granular","quartz, feldspar"
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10
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"Sedimentary","Conglomerate","various","coarse granular","various"
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11
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"Sedimentary","Shale","gray, black","fine granular","kaolinite, illite, smectite, quartz, organic matter"
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12
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"Sedimentary","Dolomite","white to gray or brown","fine granular","calcium magnesium carbonate (CaMg(CO3)2), other minerals"
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13
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"Sedimentary","Coal","black, brown","chucky, dusty,brittle","carbon, hydrogen, oxygen, sulfur, nitrogen."
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14
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"Metamorphic","Gneiss","various","banded, foliated, fibrous","quartz, feldspar, mica"
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15
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"Metamorphic","Schist","various","foliated, shiny","quartz, feldspar, mica"
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16
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"Metamorphic","Marble","white, gray, pink, blue","hard, smooth, crystalline","recrystallized calcite (CaCO3)"
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17
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"Metamorphic","Quartzite","various","hard, crystalline","quartz, other minerals"
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