
metamorphic
Unakite
Altered Granite (Epidote, Orthoclase Feldspar, and Quartz)
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, distinct pink and green coloration, vitreous to dull luster, and granular crystal structure.
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Physical properties
Hardness of 6-7 on the Mohs scale, distinct pink and green coloration, vitreous to dull luster, and granular crystal structure.
Formation & geological history
Formed by the hydrothermal alteration of granitic rocks, where plagioclase feldspar is replaced by epidote.
Uses & applications
Used primarily for making tumbled stones, cabochons, carved decorative objects, and jewelry.
Geological facts
First discovered in the Unakas Mountains of North Carolina, from which it derives its name.
Field identification & locations
Easily identified by its mottled pink and green appearance; commonly found in glacial drift derived from the Blue Ridge Mountains.
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