Calcite Beads

Calcite is a form of calcium carbonate (CaCO3) that is the primary constituent of limestone. Calcite is considered an 'all-pervading' mineral as it is found almost everywhere in the world. Calcite can for form from the precipitation of calcium carbonate in seawater, in hydrothermal veins, or from the diagenesis of shells and skeletal parts of marine organisms. Calcite is a very soft mineral with a Mohs Harness of 3.