Large AragoniteThese translucent crystal carbonate minerals come in browns and blues grey. They grow in pseudo hexagonal shapes. Aragonite is a common mineral and can be found all over, even some marine animals such as corals and clams produce Aragonite. The surface of pearls is a layer of this calcium carbonate. Sold individually. The Aragonite crystal rock you receive may not be depicted in the image. Length: 2. 5 in 3. 75 in Width: 2. 25 in 3 in Height: 1. 6 in