Barite is a mineral with a hardness of 3 out of 10 on the Mohs scale of mineral hardness [?]. These Orthorhombicly structured gems are made of barium sulfate, their full chemical compound being BaSO4.
Barite also called Baryte or heavy spar is a clear to yellowish to blue mineral that is very soft and not well suited for making of gemstones. (Its a 3 on the harness scale). Its found near lead-zinc mines within limestone deposits.
All in all a nice item for a collector, but in terms of long term jewelry this is not a very suitable gem for rings, and necklaces as it will break and shear apart when contacting harder surfaces.
Has been used for drilling fluids. Please read below.
Barite is very useful in terms of its ability to prevent blowouts by acting as a weighting agent for drilling fluids. Barite / Heavy spar is used in larger quantities in terms of percentages the further down you drill