igneous
Unakite
Altered Granite (Epidotized Granite)
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, with a mottled pink (orthoclase feldspar), green (epidote), and clear/gray (quartz) appearance and vitreous luster.
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Physical properties
Hardness of 6-7 on the Mohs scale, with a mottled pink (orthoclase feldspar), green (epidote), and clear/gray (quartz) appearance and vitreous luster.
Formation & geological history
Formed through hydrothermal alteration of granitic rocks, where heated fluids metamorphose the original minerals into epidote.
Uses & applications
Commonly used for lapidary work, cabochons, carved decorative objects, and low-cost tumbled gemstone jewelry.
Geological facts
First discovered in the Unaka Mountains of North Carolina, from which it derives its name.
Field identification & locations
Easily identified by its distinct blotchy pink and pistachio-green color combination; found globally wherever granites undergo hydrothermal weathering.
