metamorphic

Unakite

Unakite (Epidotized Granite)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs), Color: Mottled green, pink, and gray/clear, Luster: Vitreous to dull, Crystal Structure: Monoclinic/Trigonal (matrix), Specific Gravity: 2.85-3.00

Identified May 16, 2026More metamorphic →

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Physical properties

Hardness: 6-7 (Mohs), Color: Mottled green, pink, and gray/clear, Luster: Vitreous to dull, Crystal Structure: Monoclinic/Trigonal (matrix), Specific Gravity: 2.85-3.00

Formation & geological history

Formed through the hydrothermal alteration of granite, where plagioclase feldspar is replaced by epidote. Usually associated with Precambrian or Paleozoic metamorphic belts.

Uses & applications

Widely used for lapidary work, cabochons, decorative beads, architectural facings, and small carvings.

Geological facts

Named after the Unaka Range of the Appalachian Mountains in North Carolina/Tennessee where it was first discovered. It is the state rock of Virginia.

Field identification & locations

Identify by its unique pistachio-green (epidote) and pink (orthoclase) mottled appearance. Found in river beds and beach gravels in the Great Lakes region and the Blue Ridge Mountains.