metamorphic
Unakite
Altered Granite (Epidote, Orthoclase Feldspar, Quartz)
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, with a mottled pink, green, and white color. It features a vitreous to dull luster and a compact, granular crystal structure.
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Physical properties
Hardness of 6-7 on the Mohs scale, with a mottled pink, green, and white color. It features a vitreous to dull luster and a compact, granular crystal structure.
Formation & geological history
Formed through the hydrothermal alteration or metasomatism of granitic rocks, where plagioclase feldspar is replaced by epidote.
Uses & applications
Used primarily for making tumbled stones, cabochons, beads, carved decorative objects, and occasionally architectural tiles.
Geological facts
First discovered in the Unaka Mountains of North Carolina, from which it derives its name. It is commonly associated with copper, iron, and gold ore deposits.
Field identification & locations
Easily identified in the field by its distinct patchy green and pink coloration. Found worldwide, with notable deposits in the US, South Africa, Brazil, and China.
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