metamorphic
Unakite
Granitic rock composed of pink orthoclase feldspar, green epidote, and clear quartz
Hardness of 6-7 on the Mohs scale, mottled green and pink coloration, vitreous to greasy luster, massive crystal structure with no distinct cleavage, specific gravity of roughly 2.55-2.75
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Physical properties
Hardness of 6-7 on the Mohs scale, mottled green and pink coloration, vitreous to greasy luster, massive crystal structure with no distinct cleavage, specific gravity of roughly 2.55-2.75
Formation & geological history
Formed by the hydrothermal alteration (metamorphism) of granite, where hot waters alter plagioclase feldspar into green epidote
Uses & applications
Used primarily as a decorative stone for cabochons, beads, spheres, tumbled stones, and occasionally architectural tile
Geological facts
Named after the Unaka Mountains in the western United States where it was first discovered, unakite is a striking rock that combines the contrasting colors of pink and green
Field identification & locations
Easily identified by its characteristic mottled appearance featuring distinct green epidote mixed with pink orthoclase feldspar; commonly found in glacial drift and alluvial deposits derived from granitic regions
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