gemstone
Sunstone
Feldspar (Oligoclase)
AI-generated identification · may be incorrectHardness of 6 to 6.5 on the Mohs scale, typically transparent to translucent with colors ranging from clear, yellow, and orange to reddish-brown. Exhibits a distinctive metallic glitter or schiller caused by tiny copper or hematite inclusions.
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Physical properties
Hardness of 6 to 6.5 on the Mohs scale, typically transparent to translucent with colors ranging from clear, yellow, and orange to reddish-brown. Exhibits a distinctive metallic glitter or schiller caused by tiny copper or hematite inclusions.
Formation & geological history
Forms primarily in igneous rocks like basalt and granitic pegmatites, as well as metamorphic rocks, through cooling and crystallization of magma over millions of years.
Uses & applications
Widely used in high-end jewelry, carvings, and as a collectible gemstone specimen due to its unique optical schiller effect.
Geological facts
The metallic shimmer is known as aventurescence, which is caused by light reflecting off microscopic flat platelets of copper suspended inside the mineral.
Field identification & locations
Identified easily by its characteristic copper-like internal flash and vitreous luster; commonly sourced from Oregon, USA, India, and Norway.
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