metamorphic

Polished Unakite pebble

Unakite: pink potassium feldspar and green epidote in quartz-rich rock

AI-generated identification · may be incorrect

Mohs hardness 6–7; mottled pistachio-green, salmon-pink, and cream; opaque with a vitreous-to-waxy polish; granular, interlocking crystals and no prominent cleavage in the finished piece. Specific gravity is approximately 2.7–3.1.

Identified September 7, 2026More metamorphic →

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Physical properties

Formation & geological history

Formed when granite underwent hydrothermal alteration, replacing some feldspar with epidote; commonly associated with Paleozoic Appalachian rocks, especially those exposed in the Blue Ridge. The polished item is likely a modern tumbled or cut specimen.

Uses & applications

Used for cabochons, beads, carvings, worry stones, and decorative objects; it has modest jewelry and collector value rather than major commercial significance.

Geological facts

Its characteristic green-and-pink pattern results from epidote replacing altered feldspar while quartz remains. Color intensity and pattern vary substantially between specimens.

Field identification & locations

Identify it by the distinctive mottled green epidote, salmon feldspar, and quartz pattern, moderate hardness, and lack of banding or metallic sparkle; common sources include Virginia and North Carolina, USA. A small polished piece typically sells for $3–$15; unusually attractive larger specimens may reach $20–$50.