Celestine occurs as crystals, and also in compact massive and fibrous forms. It is mostly found in sedimentary rocks, often associated with the minerals gypsum, anhydrite, and halite. The mineral is found worldwide, usually in small quantities.
Crystal habit: Tabular to pyramidal crystals, also fibrous, lamellar, earthy, massive gr...
Color: White, Pink, Pale green, Pale brown, Black, Pale blue, Reddish, Greyish; Colo...
Category: Sulfate minerals
Ultraviolet fluorescence: Short UV=yellow, white blue, long UV=yellow, white blue.
The blue celestite that most people are familiar with comes from Northwestern Madagascar. Large crystals and geodes are frequently found there. This famous Madagascar locality discovered in 1967 has an annual production of about 15 tons of the material.
