metamorphic
Tumbled unakite
Unakite: epidote, pink potassium feldspar (orthoclase), and commonly quartz
AI-generated identification · may be incorrectOpaque, mottled green and salmon-pink, with a polished surface and granular texture. Epidote and feldspar are about 6–7 on the Mohs scale; the rock has no consistent overall crystal structure or cleavage.
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Physical properties
Opaque, mottled green and salmon-pink, with a polished surface and granular texture. Epidote and feldspar are about 6–7 on the Mohs scale; the rock has no consistent overall crystal structure or cleavage.
Formation & geological history
A metamorphosed granite, formed when hydrothermal alteration converted some feldspar to epidote; unakite occurs in ancient crystalline rocks, including the Proterozoic Blue Ridge region.
Uses & applications
Used for tumbled stones, beads, carvings, and decorative objects; it has little industrial or construction use.
Geological facts
The name comes from the Unaka Mountains of North Carolina and Tennessee, where it was first described.
Field identification & locations
Identify it by its distinctive salmon-pink feldspar mixed with pistachio-green epidote, often with quartz. It is found in parts of the Appalachian Mountains and is widely sold as tumbled material.
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