mineral
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
AI-generated identification · may be incorrectHardness of 6 to 6.5 on the Mohs scale, peach-orange to reddish color, vitreous to pearly luster, and distinct cleavage.
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Physical properties
Hardness of 6 to 6.5 on the Mohs scale, peach-orange to reddish color, vitreous to pearly luster, and distinct cleavage.
Formation & geological history
Forms in igneous rocks like basalt and granite through the exsolution of microscopic copper or hematite platelets.
Uses & applications
Widely used in faceted gemstones, polished pendants, beads, and collector jewelry.
Geological facts
Its distinct metallic shimmer, known as aventurescence, is caused by light reflecting off internal mineral platelets.
Field identification & locations
Identified by its characteristic warm orange body color and glittering metallic inclusions; found in India, Norway, and the USA.
