metamorphic
Unakite
Altered Granite (Granitic Metamorphic Rock)
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, characterized by a distinct mottled green and pink coloration with vitreous to dull luster. Composed primarily of pink orthoclase feldspar, green epidote, and clear quartz.
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Physical properties
Hardness of 6-7 on the Mohs scale, characterized by a distinct mottled green and pink coloration with vitreous to dull luster. Composed primarily of pink orthoclase feldspar, green epidote, and clear quartz.
Formation & geological history
Formed through hydrothermal alteration of granitic rocks, where hot fluids transform plagioclase feldspar into epidote. Found worldwide in regions subjected to significant tectonic and hydrothermal activity.
Uses & applications
Commonly used in lapidary work, carved into decorative objects, and polished for use in jewelry such as cabochons and beads.
Geological facts
First discovered in the Unaka Mountains of North Carolina, from which it derives its name. The striking pink and green contrast makes it a favorite among amateur rockhounds.
Field identification & locations
Easily identified in the field by its distinct patchy combination of pink feldspar and pistachio-green epidote. Commonly found in glacial drift and stream beds originating from granitic terrains.
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