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Limestone

A sedimentary rock composed principally of calcium carbonate (the mineral calcite) or the double carbonate of calcium and magnesium (the mineral dolomite), or a mixture of the two. (ASTM C1528) Recrystallized limestone, compact microcrystalline limestone, and travertine that are capable of taking a polish are also included in the category commercial marble and may be sold as either limestone or marble. (ASTM C119)

Synonyms: 
calcarenite
coquina
dolomite
oolitic limestone
travertine

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