Unakite

Physical Properties

Hardness: 6 to 7 Mohs; Color: Mottled green, pink, and orange-red; Luster: Vitreous to dull; Crystal structure: Monoclinic (Epidote) and Triclinic (Feldspar); Cleavage: Indistinct; Specific Gravity: 2.85-3.20.

Formation & Geological History

Formed through the hydrothermal alterations of granite. Originally an igneous rock, it underwent metamorphism where plagioclase was replaced by epidote. Common in the Unaka Mountains of North Carolina and Tennessee.

Uses & Applications

Primarily used for decorative purposes including jewelry beads, cabochons, carvings, and small ornamental sculptures. Occasionally used as a construction stone for floor tiles or steps.

Geological Facts

Unakite is named after the Unaka Mountains where it was first discovered. It is unusual because it is a rock that contains both pink orthoclase feldspar and green epidote, which are typically found in different environments.

Field Identification & Locations

Identify by its distinctive pistachio-green and salmon-pink mottled appearance. It is found in river beds as pebbles and in mountain outcrops. Collectors should look for balanced color distribution for higher quality.

Identified on: 5/8/2026

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