metamorphic
Unakite
Altered Granite
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, with a distinctive mottled pink (orthoclase feldspar), green (epidote), and clear/white (quartz) coloration. It has a vitreous to dull luster and a granular structure.
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Physical properties
Hardness of 6-7 on the Mohs scale, with a distinctive mottled pink (orthoclase feldspar), green (epidote), and clear/white (quartz) coloration. It has a vitreous to dull luster and a granular structure.
Formation & geological history
Formed through the hydrothermal alteration of granitic rocks, where hot fluids alter plagioclase feldspar into epidote. It is commonly found in the Blue Ridge Mountains of North Carolina and glacial drift pebbles.
Uses & applications
Used primarily in lapidary work for making cabochons, beads, spheres, and ornamental carvings.
Geological facts
Unakite was first discovered in the Unaka Mountains of North Carolina, from which it derives its name. It is technically a granitic rock, not a distinct mineral species.
Field identification & locations
Easily identified in the field by its striking mosaic of pink feldspar and pistachio-green epidote. Collectors often find smooth, water-worn pebbles in riverbeds and glacial deposits.
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