mineral
Satin Spar Gypsum
Gypsum (CaSO4·2H2O)
AI-generated identification · may be incorrectMohs hardness of 2, white to yellow color, silky or pearly luster, monoclinic crystal system with fibrous habit, specific gravity of 2.3.
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Physical properties
Mohs hardness of 2, white to yellow color, silky or pearly luster, monoclinic crystal system with fibrous habit, specific gravity of 2.3.
Formation & geological history
Formed through the evaporation of sulfate-rich water in marine or lacustrine environments.
Uses & applications
Used primarily for decorative carvings, polished specimens, and holistic crystal collections.
Geological facts
Satin spar gets its name from its fibrous structure that creates a chatoyant cat's-eye light reflection.
Field identification & locations
Easily identified by its fibrous texture and low hardness allowing it to be scratched by a fingernail.
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