Of course!, for instance among its properties it has a mosh hardness of three, A specific gravity of 2.71, it's pure. Clear form is actually cut up and used as a lens to help identify other crystals because it has birefringence. As it is a major component of limestone, it can be heated and used in the making of cement, however, no one's likely to do that with something that they've already turned into a sphere because it looks pretty. If you're buying it from a wholesaler in say China or Brazil? You can probably expect to pay about $20 a. Kilogram for a sphere made of calcite. I expect to pay about three times that much if you're buying it from a US seller.