mineral
Sunstone
Feldspar group (Oligoclase or Labradorite), Na(AlSi3O8) to Ca(Al2Si2O8)
AI-generated identification · may be incorrectHardness of 6 to 6.5 on the Mohs scale, reddish-orange to brown color with a metallic schiller effect, vitreous luster, and triclinic crystal system.
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Physical properties
Hardness of 6 to 6.5 on the Mohs scale, reddish-orange to brown color with a metallic schiller effect, vitreous luster, and triclinic crystal system.
Formation & geological history
Forms within igneous rocks like basalt and granitic pegmatites through the cooling of magma, often containing microscopic copper platelets that create its signature shimmer.
Uses & applications
Widely used in gemstone jewelry, cabochons, carvings, and as a collectible mineral specimen.
Geological facts
The distinctive metallic sparkle, known as aventurescence, is caused by tiny inclusions of metallic copper or hematite reflecting light.
Field identification & locations
Identified by its characteristic warm shimmer and reddish-orange color; commonly sourced from Oregon in the USA, India, Norway, and Madagascar.
