metamorphic
Unakite
Altered Granite (composed of orthoclase feldspar, epidote, and quartz)
AI-generated identification · may be incorrectHardness of 6 to 7 on the Mohs scale, characterized by distinct mottled green and pink colors, vitreous luster, and microcrystalline to phaneritic crystal structure with no distinct cleavage.
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Physical properties
Hardness of 6 to 7 on the Mohs scale, characterized by distinct mottled green and pink colors, vitreous luster, and microcrystalline to phaneritic crystal structure with no distinct cleavage.
Formation & geological history
Formed through hydrothermal alteration and metamorphism of granitic rocks, where calcium-rich plagioclase is replaced by epidote.
Uses & applications
Widely used in lapidary work to create polished cabochons, beads, spheres, and ornamental decorative carvings.
Geological facts
First discovered in the Unaka Mountains of North Carolina, from which its name is derived.
Field identification & locations
Easily identified by its unique pink and green coloration; commonly sourced in the United States, South Africa, and Brazil.
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