mineral

Angelite (Blue Anhydrite)

Anhydrite (CaSO4)

AI-generated identification · may be incorrect

Hardness: 3.5 on Mohs scale; Color: soft sky-blue to grayish-blue with white or brown flecks and veining; Luster: vitreous to pearly; Crystal system: orthorhombic; Specific gravity: ~2.97.

Hardness: 3
Luster: vitreous to pearly

Identified October 3, 2026More mineral →

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Physical properties

Hardness: 3.5 on Mohs scale; Color: soft sky-blue to grayish-blue with white or brown flecks and veining; Luster: vitreous to pearly; Crystal system: orthorhombic; Specific gravity: ~2.97.

Formation & geological history

Formed in evaporite deposits when gypsum loses its water content through dehydration under heat and pressure, often found in sedimentary basins.

Uses & applications

Popular for ornamental carvings, gemstone eggs, spheres, beads, cabochons, and widely used in metaphysical crystal practices.

Geological facts

Angelite was discovered in Peru during the 1986 Harmonic Convergence, giving rise to its trade name Angelite due to its serene heavenly blue color. Because it is anhydrous calcium sulfate, exposure to water can slowly alter it back into gypsum.

Field identification & locations

Identified by its distinctive light blue color, moderate softness (scratched easily by a copper coin or nail), and mottled appearance. Notable deposits are found in Peru, Mexico, Germany, and the USA.