mineral

Angelite

Anhydrous Calcium Sulfate (CaSO4)

Hardness: 3.5 on Mohs scale. Color: Pale blue, grey-blue, to lavender-blue. Luster: Vitreous to pearly. Crystal structure: Orthorhombic. Cleavage: Perfect in three directions. Specific gravity: 2.9–3.0.

Hardness: 3
Color: Pale blue, grey-blue, to lavender-blue
Luster: Vitreous to pearly

Identified June 15, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed from the dehydration of gypsum over millions of years in sedimentary evaporite deposits. It occurs when gypsum is in contact with water and then loses it, crystallizing into a solid mineral mass.

Uses & applications

Primarily used for decorative purposes, carvings, and as a semi-precious gemstone in jewelry (mainly pendants and earrings due to its softness). Highly valued in metaphysical and collecting circles.

Geological facts

Angelite was first discovered in Peru in 1987. It is a variety of Anhydrite that displays a unique 'celestial' blue color. If soaked in water, it can revert back into gypsum.

Field identification & locations

Identify by its distinctive soft blue color and 'waxy' or pearly feel when polished. It is famously found in Peru, but also occurs in Britain, Germany, and Poland. Collectors should keep it away from water as it is unstable in moist environments.