Question

Which of the following is not a carbonate mineral?

• A. Siderite
• B. Calamine
• C. Limestone
• D. Fluorospar

Answer 1

The correct option is D Fluorospar

A) Siderite is a mineral composed of iron(ll) carbonate, i.e., $FeC{O}_3$.
B) Calamine is either a mixture of zinc oxide $\left(ZnO\right)$ with about $0.5\%$ ferric oxide $\left(F{e}_2{O}_3\right)$ or a zinc carbonate compound.
C) Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate $\left(CaC{O}_3\right)$.
D) Fluorite (also called fluorspar) is a halide mineral composed of calcium fluoride, $Ca{F}_2$.