mineral
Angelite
Anhydrite (CaSO4)
Hardness: 3.5 on Mohs scale; Color: Pale blue to lilac-blue; Luster: Vitreous to pearly; Crystal structure: Orthorhombic; Specific Gravity: 2.9–3.0
- Hardness
- 3
- Color
- Pale blue to lilac-blue
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 3.5 on Mohs scale; Color: Pale blue to lilac-blue; Luster: Vitreous to pearly; Crystal structure: Orthorhombic; Specific Gravity: 2.9–3.0
Formation & geological history
Formed from sedimentary evaporite deposits where gypsum has lost its water content due to heat and pressure. Most high-quality specimens are found in Peru.
Uses & applications
Primarily used as a decorative stone for jewelry, cabochons, carvings, and as a popular specimen for crystal healing and metaphysical collections.
Geological facts
Angelite is essentially compressed anhydrous calcium sulfate. It is the dehydrated form of gypsum and will actually turn back into gypsum if it is submerged in water for too long.
Field identification & locations
Identified by its signature soft blue-grey color and 'waxy' texture when polished. Keep it away from water sources. Commonly found in Peru, Mexico, and Libya.
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Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous