Blue Calcite Palm Stones - 100 pounds**Requires 150lbs of shipping space Locality: Madagascar Color: Calcite can occur in a variety of colors including white, colorless, gray, yellow, green, blue, orange, red, brown, black, and sometimes multicolored due to impurities. Hardness: Calcite has a Mohs hardness of 3, which means it is relatively soft compared to many other minerals. It can be scratched easily with a knife or a fingernail. Clarity: Calcite is commonly found in transparent to