mineral

Satin Spar (often marketed as Selenite)

Fibrous Gypsum (CaSO4·2H2O)

AI-generated identification · may be incorrect

Hardness: 2 on Mohs scale (can be scratched by a fingernail). Color: Pearly white with a silky luster. Crystal structure: Monoclinic, typically found in fibrous, translucent masses that exhibit a 'cat's eye' chatoyancy.

Hardness: 2 on Mohs scale (can be scratched by a fingernail)
Color: Pearly white with a silky luster

Identified March 30, 2026More mineral →

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Physical properties

Formation & geological history

Formed as an evaporite mineral in sedimentary environments, often through the evaporation of seawater or in clay beds. Geological age varies by deposit, but it is common in Mesozoic and Cenozoic formations.

Uses & applications

Commonly used for ornamental carvings, spiritual/healing wands, and decorative items. In a broader sense, gypsum is essential for manufacture of wallboard (drywall), cement, and plaster of Paris.

Geological facts

While commonly called 'Selenite' in the crystal/metaphysical market, this specific fibrous variety is scientifically 'Satin Spar.' True Selenite is transparent and forms in clear, window-like plates. This specimen is engraved with symbols representing the seven chakras.

Field identification & locations

Identify in the field by its extreme softness and silky, fibrous appearance that reflects light in bands. Commonly found in Morocco, Mexico, and the United States (Utah/New Mexico). Keep away from water as it can dissolve or lose its luster over time.