metamorphic
Unakite
Altered granitic rock (epidosite/unakite)
AI-generated identification · may be incorrectHardness 6 - 7 on the Mohs scale, mottled reddish-pink and pistachio-green color with white or grayish quartz flecks, vitreous to dull luster, granoblastic/massive texture, specific gravity 2.85 - 3.2.
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Physical properties
Hardness 6 - 7 on the Mohs scale, mottled reddish-pink and pistachio-green color with white or grayish quartz flecks, vitreous to dull luster, granoblastic/massive texture, specific gravity 2.85 - 3.2.
Formation & geological history
Formed through hydrothermal metamorphism of granite where plagioclase feldspar is altered to green epidote, while pink orthoclase feldspar and quartz remain largely intact.
Uses & applications
Commonly carved and polished into ornamental stones, eggs, spheres, beads, cabochons, and decorative tiles.
Geological facts
Unakite was first discovered in the Unaka Range of the Blue Ridge Mountains in North Carolina, USA, from which it derives its name.
Field identification & locations
Easily identified by its distinctive combination of salmon-pink orthoclase feldspar and pistachio-green epidote veins or patches. Widely found in North Carolina, Virginia, South Africa, and Brazil.
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