metamorphic
Unakite
Altered Granite (Epidotized Granite)
AI-generated identification · may be incorrectHardness of 6-7 on Mohs scale. Distinctive mottled pink (orthoclase feldspar), green (epidote), and clear/gray (quartz) coloration with a vitreous to dull luster.
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Physical properties
Hardness of 6-7 on Mohs scale. Distinctive mottled pink (orthoclase feldspar), green (epidote), and clear/gray (quartz) coloration with a vitreous to dull luster.
Formation & geological history
Formed by hydrothermal alteration and metamorphism of granitic rocks, where calcium-rich plagioclase is replaced by epidote.
Uses & applications
Widely used for lapidary work, carved decorative objects, cabochons, and polished tumbled stones.
Geological facts
First discovered in the Unaka Mountains of North Carolina, from which it derives its name. It is a favored stone among rockhounds for its vibrant mosaic-like patterns.
Field identification & locations
Easily identified by its unique tri-color composition of pink feldspar and pistachio-green epidote. Commonly found in the Blue Ridge Mountains, South Africa, and Brazil.
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