However they are usually well-formed and interesting to examine. Glauberite forms in saline environments with other evaporite minerals such as halite , gypsum , calcite and thenardite . Modern as well as prehistoric evaporite deposits can have glauberite crystals. Some glauberite has been identified in sublimate deposits on lavas off the coast of Sicily. Hydrothermal precipitation of glauberite is also seen.
Color is ordinarily white, yellow, gray or colorless.
Luster is vitreous, greasy to dull. Transparency crystals are transparent to translucent. Crystal Habits include the steeply inclined wedge to tabular shaped dipyramidal crystals. Fracture is conchoidal. Streak is white.