metamorphic
Unakite
Unakite (metamorphosed granitic rock)
Hardness: 6-7 (Mohs), Color: Mottled green (epidote) and pink (orthoclase feldspar) with white quartz, Luster: Vitreous to dull, Crystal Structure: Monoclinic/Triclinic mixture, Cleavage: Poor
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Physical properties
Hardness: 6-7 (Mohs), Color: Mottled green (epidote) and pink (orthoclase feldspar) with white quartz, Luster: Vitreous to dull, Crystal Structure: Monoclinic/Triclinic mixture, Cleavage: Poor
Formation & geological history
Formed through the hydrothermic metamorphism of granite, where plagioclase feldspar is replaced by epidote. Usually associated with Precambrian or Paleozoic geological ages.
Uses & applications
Commonly used as a lapidary material for beads, cabochons, carvings, and architectural accents.
Geological facts
It was first discovered in the Unaka Range of North Carolina and Tennessee, USA, from which it derives its name.
Field identification & locations
Identify by its distinct mottled green and pink appearance. Found in river beds and glacial till in the Blue Ridge Mountains and Lake Superior regions.
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