Bronzite completely hand polished flat stone from Minas Gerais in Brazil.

Bronzite/Enstatite: The pyroxenes (inosilicaten) enstatite (MgSiO3 chemical formula) and ferrosiliet (Fe2 + MgSiO3) form a complete solid solution series and are common rock forming minerals in igneous and metamorphic rocks, and also in meteorites. The intermediate composition, with magnesium and Iron2 +, (Mg, Fe) SiO3, is also known under the name of hypersthene, but this name is officially no longer in use and replaced by enstatite or ferrosiliet. Enstatite and the other of the orthorhombic monoclinic pyroxenes differ by their optical properties, such as quenching and pleochroïsme. The crystals have a clear cleavage according to the crystal planes [110] and [010]. Enstatite is white, gray, greenish or brown. The hardness is 5.5, and the density is 3.2 kg / dm3. The name of the mineral enstatite is derived from the Greek enstates, which means "adversary" or "counterpart." It is so named because it is the magnesium-containing end member of the series with ferrosiliet. The bronze-brown variety of enstatite is called source sees. Enstatite crystals are found in stone and iron meteorites, as in the meteorite which fell at Breitenhach in the Erzgebirge, Bohemia. Large crystals, up to 30 centimeters in length, are found in mica-schist-cutting apatietaders in apatietmijn of Kjorrestad, at Brevig in southern Norway. Individual crystals are rarely found because the mineral found in igneous rocks or mantle peridotite and pyroxenite rocks like. By weathering of rocks which formed the mineral serpentine. Small crystals are found in extrusive as trachyte and andesites. The type locality of enstatite is not defined.