mineral

Pink Satin Spar (Satin Spar Selenite Dyed)

Gypsum (CaSO4·2H2O)

Hardness: 2 on Mohs scale (can be scratched by a fingernail). Color: Naturally white/pearly, but pink in this specimen due to dye. Luster: Silky to pearly. Crystal structure: Monoclinic, typically fibrous. Cleavage: Perfect in one direction.

Hardness: 2 on Mohs scale (can be scratched by a fingernail)
Color: Naturally white/pearly, but pink in this specimen due to dye
Luster: Silky to pearly

Identified May 20, 2026More mineral →

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Physical properties

Formation & geological history

Formed as an evaporite mineral in sedimentary environments, specifically from the evaporation of seawater in ancient basins or from hydrothermal veins.

Uses & applications

Used primarily in ornamental decor, specialty gifts, and for its reported metaphysical properties in holistic circles. Industrial gypsum is used for plaster and drywall.

Geological facts

Satin spar is a fibrous variety of gypsum. While naturally occurring pink gypsum exists (colored by iron oxides), many vibrant pink specimens found in retail shops are artificially dyed to enhance their visual appeal.

Field identification & locations

Identify by its extreme softness (scratched by a nail) and fibrous 'cat's eye' silky luster. Commonly found in Morocco, Mexico, and the USA. Collectors should be aware that intense magenta colors are usually treated.

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