Not a rock
Not a rock
Not a rock
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Physical properties
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Formation & geological history
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Other not a rock specimens
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Pink granite
Granite, chiefly quartz, potassium feldspar, and plagioclase with minor mica
igneous
Granite
Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica
igneous
Fossilized gastropod shell
Gastropoda indet.; shell originally composed mainly of aragonite (CaCO₃)
fossil
Red coral (coral beads)
Precious coral, usually Corallium spp.; composed primarily of calcium carbonate (calcite)
gemstone