metamorphic
Unakite
Altered Granite (Epidotized Granite)
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, featuring distinct mottled green epidote, pink orthoclase feldspar, and clear quartz with a vitreous luster.
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Physical properties
Hardness of 6-7 on the Mohs scale, featuring distinct mottled green epidote, pink orthoclase feldspar, and clear quartz with a vitreous luster.
Formation & geological history
Formed through hydrothermal alteration of granitic rocks, where heated fluids transform plagioclase feldspar into epidote.
Uses & applications
Used primarily in lapidary arts for cabochons, beads, carved spheres, and decorative architectural stone.
Geological facts
First discovered in the Unaka Mountains of North Carolina, from which this distinctive rock derives its name.
Field identification & locations
Easily identified by its unique tri-color mosaic of pink, green, and white; commonly found in glacial drift derived from granitic terranes.
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