metamorphic
Unakite
Altered Granite (Orthoclase Feldspar, Epidote, and Quartz)
AI-generated identification · may be incorrectHardness of 6 to 7 on the Mohs scale, with mottled pink, green, and clear colors. It has a vitreous to dull luster and a compact, granular crystal structure.
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Physical properties
Hardness of 6 to 7 on the Mohs scale, with mottled pink, green, and clear colors. It has a vitreous to dull luster and a compact, granular crystal structure.
Formation & geological history
Formed through hydrothermal alteration of granite, where plagioclase feldspar is replaced by epidote. It is commonly found in glacial drift and mountainous regions.
Uses & applications
Used primarily for making tumbled stones, cabochons, carvings, and wire-wrapped jewelry pieces.
Geological facts
First discovered in the Unaka Mountains of North Carolina, from which it derives its name. The green color is due to the presence of epidote.
Field identification & locations
Easily identified by its distinct pink and olive-green mottled appearance. It is a popular collector stone found worldwide in areas of ancient granite alteration.
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