metamorphic
Unakite
Epidote–feldspar granite; chiefly epidote, pink orthoclase feldspar, and quartz
AI-generated identification · may be incorrectTypically mottled salmon-pink and green, with a granular texture and vitreous to dull luster. Hardness is about 6–7 Mohs; the image’s rough surface and colors fit unakite, though a photo cannot confirm composition.
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Physical properties
Typically mottled salmon-pink and green, with a granular texture and vitreous to dull luster. Hardness is about 6–7 Mohs; the image’s rough surface and colors fit unakite, though a photo cannot confirm composition.
Formation & geological history
Forms when granite is altered by hydrothermal fluids, transforming some feldspar into green epidote. Its age depends on the source granite; unakite is notably found in the southern Appalachian region.
Uses & applications
Used for beads, cabochons, carvings, and decorative stone; not generally used as a major construction material.
Geological facts
The name comes from the Unaka Mountains of North Carolina and Tennessee, where it was first described.
Field identification & locations
Look for the distinctive intergrowth of pink feldspar and green epidote, often with minor quartz. Commonly collected in the Appalachians and sold as tumbled or rough stone.
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