metamorphic
Unakite
Altered Granite
Hardness of 6 to 7 on the Mohs scale, mottled appearance with pink orthoclase feldspar, green epidote, and clear quartz, subvitreous luster, massive to granular crystal structure.
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Physical properties
Hardness of 6 to 7 on the Mohs scale, mottled appearance with pink orthoclase feldspar, green epidote, and clear quartz, subvitreous luster, massive to granular crystal structure.
Formation & geological history
Formed by hydrothermal alteration of granite, where hot fluids transform plagioclase feldspar into epidote, creating a distinctive green and pink rock.
Uses & applications
Used for making cabochons, beads, carved spheres, tumbled stones, and various decorative ornamental items in jewelry and lapidary arts.
Geological facts
First discovered in the Unaka Mountains of North Carolina, from which it derives its name.
Field identification & locations
Easily identified by its characteristic mottled pink and green coloration. Commonly found in glacial drift derived from granitic terranes, such as the Blue Ridge Mountains in the US.
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