metamorphic
Unakite
Altered granite (Epidote, Orthoclase Feldspar, Quartz)
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, with a distinctive mottled green and pink coloration. It exhibits a vitreous to dull luster and possesses a compact, massive crystal structure without distinct cleavage.
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Physical properties
Hardness of 6-7 on the Mohs scale, with a distinctive mottled green and pink coloration. It exhibits a vitreous to dull luster and possesses a compact, massive crystal structure without distinct cleavage.
Formation & geological history
Formed by the hydrothermal alteration of granite, where plagioclase feldspar is replaced by epidote. It typically develops in metamorphic environments associated with orogenic belts.
Uses & applications
Primarily used as a decorative stone for cabochons, beads, spheres, and small sculptures in lapidary arts. It is also collected as a popular ornamental rock.
Geological facts
First discovered in the Unaka Mountains of North Carolina, which is the source of its name. The striking contrast between green epidote and pink feldspar makes it instantly recognizable.
Field identification & locations
Easily identified by its unique mosaic of pistachio green and pink patches. Commonly found in glacial drift derived from granite-bearing mountain ranges.
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