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Gemologically, diaspore is an aluminum oxide hydroxide by chemical composition and its crystals have an orthorhombic structure. Diaspore is reasonably hard at 6.5 to 7 on the Mohs scale, and it has a density or specific gravity of 3.30 to 3.39, similar to jadeite or peridot. Diaspore also has a relatively high refractive index at 1.702-1.750, ranking between tanzanite and spinel. Diaspore has perfect cleavage in one direction.
When Murat Akgun, a Turkish jeweler, acquired the rights to mine disaspore in Turkey, he introduced the Zultanite brand to evoke the Sultans of the Ottoman empire. More recently, the mine owner, Milenyum Mining, has marketed the material under the name of Csarite. To avoid the confusion of so many marketing names, we refer to this material by its gemological name, Diaspore. Turkish Diaspore would also be an appropriate name, since quantities of gem-quality material seem to be unique to that location.