Question

which mineral is found in both limestone and marble?
calcite
sulfite
alumina
olivite

Explanation:

Limestone is a sedimentary rock mainly composed of calcite (calcium carbonate). Marble is a metamorphic rock formed from limestone. During metamorphism, the calcite in limestone recrystallizes but remains calcite in marble. Sulfite is not a common mineral in these rocks. Alumina (\(Al_2O_3\)) is not the main component. Olivite is a different mineral (e.g., \((Mg,Fe)_2SiO_4\)) not found in these two rocks in the required context.

Answer:

calcite