Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate.  The color blue can occur when the mineral is charged with impurities. It also occurs as a vein mineral in deposits from hot springs, and it occurs in caverns as stalactites and stalagmites.

Blue calcite is a stone that is especially calming and soothing. Nearness of this stone is great for calming frayed nerves.

Stone sizes range from 1/2" to 1"