USA, Color: blue or violetish blue, colorless, Hardness: 6 6.5, Refractive index: 1.76 1.80, Density: 3.60 3.68, Chemical composition: BaTiSi3O9, Crystal structure: hexagonal, Lustre: vitreous, Origins: San Benito Country, USA. Very rare collectors stone. Found only in San Benito County, California, USA, with specimens over 2 ct. being extremely rare.
Afghanistan, Pakistan, Burma, Brazil, Madagascar, USA, Canada, Russia, Madagascar, Brazil, Canada, Mexico, Madagascar, Brazil, Canada, Mexico
Violet, Blue, Colorless, Blue, pink, White, Colorless
Colorless, pink
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)