Honey Calcite is a yellow to gold form of calcium carbonate and has a low Mohs hardness of 3. The word Calcite comes from the German word "calcit," meaning limestone. Limestone is a sedimentary rock that is composed primarily of Calcite. Honey Calcite can be found within white Calcite and optical Calcite. The largest piece of Calcite ever found was discovered in Iceland, but Calcite is found all over the world. Over 800 forms of Calcite have been discovered, Honey Calcite being one of the more common forms. Honey Calcite is often filled with incredible rainbows and reflects light brilliantly.