CALCITE, PYRITE and QUARTZ, Cleveland Mine Luina TASMANIA

Calcite is a carbonate mineral and the most stable form of calcium carbonate (CaCO3). Calcite is widely present, particularly as a key element in limestone. With a hardness rating of 3 on the Mohs scale, calcite is assessed based on its ability to be scratched. Large crystals of calcite are utilized in optical devices, while limestone, primarily made up of calcite, serves a variety of purposes.

This specimen features pyrite (iron sulfide) with attractive cubic crystals.