metamorphic
Unakite
Altered Granite (Granitic Metamorphic Rock)
Hardness of 6 to 7 on the Mohs scale, characterized by mottled pink orthoclase feldspar, green epidote, and clear quartz. Luster is vitreous to dull. Crystal structure is granular.
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Physical properties
Hardness of 6 to 7 on the Mohs scale, characterized by mottled pink orthoclase feldspar, green epidote, and clear quartz. Luster is vitreous to dull. Crystal structure is granular.
Formation & geological history
Formed by the hydrothermal alteration (metamorphism) of granite, where plagioclase feldspar is replaced by epidote. Geological age varies widely depending on the location of the deposit.
Uses & applications
Used primarily in lapidary arts for cabochons, beads, carved spheres, tumbled stones, and decorative architectural items.
Geological facts
Unakite was first discovered in the Unaka Mountains of western North Carolina, from which it derives its name.
Field identification & locations
Easily identified in the field by its distinct and vibrant combination of pink and green colors. Found in various global locations including the USA, South Africa, Brazil, and China.
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