metamorphic
Unakite
Unakite, a metamorphosed granite composed mainly of epidote, pink potassium feldspar, and quartz
AI-generated identification · may be incorrectCoarse-grained, mottled green and salmon-pink; typically Mohs 6–7, with a vitreous-to-dull luster and interlocking crystals. The photo’s colors and texture are consistent with unakite, though identification from an image is not definitive.
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Physical properties
Coarse-grained, mottled green and salmon-pink; typically Mohs 6–7, with a vitreous-to-dull luster and interlocking crystals. The photo’s colors and texture are consistent with unakite, though identification from an image is not definitive.
Formation & geological history
Forms when granite undergoes hydrothermal alteration or metamorphism, converting some feldspar to green epidote; it is generally Precambrian in age. Unakite is named for the Unaka Mountains of North Carolina and Tennessee.
Uses & applications
Used as a decorative stone, in landscaping and construction, and as polished cabochons, beads, and carvings.
Geological facts
Its distinctive pink-and-green pattern reflects feldspar and epidote together with quartz.
Field identification & locations
Look for a coarse, speckled mixture of salmon-pink feldspar and pistachio-green epidote, often with gray or clear quartz. It occurs in the Appalachian region and other altered-granite terrains; value depends on size, pattern, and polish.
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