gemstone
Sunstone
Feldspar group (Oligoclase)
AI-generated identification · may be incorrectMohs hardness of 6 to 6.5, orange to reddish-brown color with a characteristic metallic glitter (aventurescence) caused by microscopic copper inclusions, and vitreous luster.
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Physical properties
Mohs hardness of 6 to 6.5, orange to reddish-brown color with a characteristic metallic glitter (aventurescence) caused by microscopic copper inclusions, and vitreous luster.
Formation & geological history
Forms in igneous rocks like basalts and granites, as well as metamorphic rocks, through the exsolution of copper platelets from plagioclase feldspar.
Uses & applications
Widely used in jewelry such as rings, pendants, and earrings, and collected as tumbled or polished decorative stones.
Geological facts
Sunstone is the official state gemstone of Oregon and was historically used by Vikings as a navigational compass due to its polarization properties.
Field identification & locations
Identify by its distinctive warm orange body color and shimmering aventurescence; commonly sourced from the USA, India, Norway, and Russia.
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