Unakite

Physical Properties

Hardness: 6-7 (Mohs scale); Color: Mottled green, pink, and gray/white; Luster: Vitreous to dull; Crystal structure: Massive (granular); Cleavage: Uneven across the rock; Specific Gravity: 2.85-3.20.

Formation & Geological History

Formed through the hydrothermal metamorphism of granite, where plagioclase feldspar is replaced by epidote. It dates back to various tectonic events, notably the Proterozoic eon in the Appalachian region.

Uses & Applications

Used primarily in lapidary work for cabochons, beads, and carvings; also used as an architectural stone, floor tiles, and as a decorative landscaping rock.

Geological Facts

Unakite was first discovered in the Unaka Range of North Carolina, USA, for which it is named. Depending on the amount of epidote, it can vary from almost entirely pink to almost entirely green.

Field Identification & Locations

Identify in the field by its distinct 'pistachio' green and 'salmon' pink mottled appearance and granular texture. It is commonly found as pebbles and cobbles in riverbeds along the Blue Ridge Mountains.

Identified on: 4/26/2026

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