metamorphic
Unakite (Granite)
Altered Granite (Orthoclase, Epidote, Quartz)
Hardness: 6-7 on Mohs scale. Color: Mottled green and pink, often with white or clear quartz. Luster: Vitreous to dull. Crystal structure: Granular, massive. Specific gravity: 2.5-3.0.
- Hardness
- 6-7 on Mohs scale
- Color
- Mottled green and pink, often with white or clear quartz
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale. Color: Mottled green and pink, often with white or clear quartz. Luster: Vitreous to dull. Crystal structure: Granular, massive. Specific gravity: 2.5-3.0.
Formation & geological history
Formed by the hydrothermal alteration (metamorphism) of granite, where plagioclase feldspar is replaced by pink orthoclase and green epidote.
Uses & applications
Used for making cabochons, beads, small decorative carvings, and polished display specimens.
Geological facts
Unakite was first discovered in the Unaka Mountains of western North Carolina, from which it gets its name.
Field identification & locations
Easily identified by its distinctive pink and green coloration. Found globally where granitic rocks undergo hydrothermal alteration, notably in the USA, South Africa, and China.
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