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.
The origin of celestine is chiefly sedimentary. It occurs as cavity or, fissure fillings, Southern and central Africa, Sixth Edition (2006)
Violet, Blue, Colorless, Blue, pink, White, Colorless
Colorless, Blue, Brown, Colorless, Green, gray