metamorphic

Unakite (likely, rough specimen)

Epidote–feldspar–quartz rock; commonly approximated as pink orthoclase + green epidote + quartz

AI-generated identification · may be incorrect

Typically pink-and-green, granular, opaque, with a vitreous to dull luster; hardness about 6–7 Mohs, no strong cleavage as a rock, and specific gravity roughly 2.8–3.2. The specimen’s colors and texture fit unakite, though the dark cavity and surface weathering limit certainty.

Identified September 8, 2026More metamorphic →

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Physical properties

Formation & geological history

Formed when granite underwent hydrothermal alteration, replacing some feldspar and quartz with green epidote; generally Paleozoic to Precambrian source rocks, depending on locality. Commonly associated with altered granitic terranes.

Uses & applications

Used as a lapidary stone for cabochons, beads, carvings, and polished stones; occasionally used decoratively in small architectural pieces. Rough common material has modest collector value.

Geological facts

The green component is epidote, while salmon-pink areas are usually potassium feldspar; quartz may appear as gray or translucent patches. Color intensity varies substantially with alteration and weathering.

Field identification & locations

Common in the Unaka Mountains of North Carolina and Tennessee, and found in altered granite regions worldwide. Identify it by its distinctive mottled pink-green pattern, granular texture, and inability to scratch easily with a steel knife; verify with hardness and mineralogical testing.