metamorphic
Unakite
Altered Granite
AI-generated identification · may be incorrectHardness of 6-7 on Mohs scale. Mottled appearance with green epidote, pink orthoclase feldspar, and clear quartz. Vitreous to dull luster.
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Physical properties
Hardness of 6-7 on Mohs scale. Mottled appearance with green epidote, pink orthoclase feldspar, and clear quartz. Vitreous to dull luster.
Formation & geological history
Formed through hydrothermal alteration of granite, where plagioclase feldspar is replaced by epidote. Associated with orogenic belts and major fault zones.
Uses & applications
Used primarily as a decorative stone, tumbled gemstone, and in carved cabochons for jewelry.
Geological facts
First discovered in the Unaka Mountains of North Carolina, from which it derives its name. It is structurally a granitic rock modified by low-temperature hydrothermal fluids.
Field identification & locations
Easily identified visually by its distinct pink and green blotched coloration. Found globally including in the USA, South Africa, China, and Brazil.
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