Limestone is composed almost entirely of calcite which has the chemical formula CaCO3.As a result,limestone is classified as ________.
A)a mineral
B)a rock
C)both a mineral and a rock
D)neither a mineral nor a rock because it is organic

Question

Quizplus · Accepted Answer

Limestone is a type of sedimentary rock formed from the accumulation of the remains of marine organisms such as shells and coral. While it is composed mainly of the mineral calcite, it is not considered a mineral because it is a naturally occurring combination of minerals and organic materials. Therefore, the best choice is B) a rock.

Limestone Is Composed Almost Entirely of Calcite Which Has the Chemical