mineral
Angelite (Blue Anhydrite)
Anhydrite (Calcium Sulfate, CaSO4)
AI-generated identification · may be incorrectHardness: 3.5 on Mohs scale; Color: soft sky-blue to denim blue with faint white streaks and reddish-brown inclusions; Luster: vitreous to pearly; Crystal system: orthorhombic; Specific gravity: 2.9–3.0.
- Hardness
- 3
- Luster
- vitreous to pearly
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Physical properties
Hardness: 3.5 on Mohs scale; Color: soft sky-blue to denim blue with faint white streaks and reddish-brown inclusions; Luster: vitreous to pearly; Crystal system: orthorhombic; Specific gravity: 2.9–3.0.
Formation & geological history
Formed as an evaporite mineral in sedimentary basin deposits when gypsum loses its water content under heat and pressure over geological time.
Uses & applications
Popular decorative and carving stone shaped into eggs, spheres, beads, and figurines; also sought after in the metaphysical and gemstone collecting community.
Geological facts
Angelite was discovered during the 1987 Harmonic Convergence in Peru; its name derives from its angelic blue color and perceived peaceful appearance.
Field identification & locations
Found predominantly in Peru, as well as evaporite basins in Mexico, Germany, and the USA. It can be identified by its characteristic soft denim-blue color, relatively low hardness (easily scratched by a copper coin or steel knife), and sensitivity to water.
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