metamorphic
Unakite
Epidotized Granite
AI-generated identification · may be incorrectHardness 6-7 on the Mohs scale, vitreous to dull luster, mottled moss-green and salmon-pink color, specific gravity ~2.85-3.2.
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Physical properties
Hardness 6-7 on the Mohs scale, vitreous to dull luster, mottled moss-green and salmon-pink color, specific gravity ~2.85-3.2.
Formation & geological history
Formed via metasomatic alteration of granitic rocks, where plagioclase feldspars are converted into epidote by hydrothermal fluids.
Uses & applications
Commonly used in lapidary arts for beads, cabochons, carvings, architectural facing, and ornamental decorative objects.
Geological facts
First discovered in the Unaka Range of the Blue Ridge Mountains in North Carolina, USA, from which it derives its name.
Field identification & locations
Identified by its distinctive combination of pistachio-green epidote and salmon-pink orthoclase feldspar; widely found in the USA, South Africa, and Brazil.
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