mineral

Angelite (Blue Anhydrite)

Anhydrite (CaSO4)

AI-generated identification · may be incorrect

Hardness: 3.5 on Mohs scale; Color: Soft celestial-blue, grayish-blue, occasionally with white veins or brownish hematite specks; Luster: Vitreous to pearly on cleavage surfaces; Crystal structure: Orthorhombic; Specific gravity: 2.9–3.0

Hardness: 3
Luster: Vitreous to pearly on cleavage surfaces

Identified October 3, 2026More mineral →

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Physical properties

Formation & geological history

Formed as an evaporite mineral in sedimentary environments when gypsum loses its water content under heat and pressure, or by direct precipitation from highly saline marine waters.

Uses & applications

Predominantly used for ornamental carvings, polished eggs, spheres, beads, cabochons, and as a popular specimen in mineral and crystal healing collections.

Geological facts

The trade name 'Angelite' was coined due to its angelic light-blue coloration. It is chemically anhydrous calcium sulfate, which can slowly alter to gypsum if soaked in water for extended periods.

Field identification & locations

Distinctive sky-blue color with fine grain and occasional white flecks or brownish spots; noticeably heavier than calcite and softer than blue quartz or chalcedony. The primary source for carving-grade material is Peru.