metamorphic
Unakite
Epidotized Granite
Hardness: 6-7 (Mohs), Color: Mottled green (epidote), pink (orthoclase feldspar), and clear/grey (quartz), Luster: Vitreous to dull, Crystal structure: Massive/granular
- Luster
- Vitreous to dull, Crystal structure: Massive/granular
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Physical properties
Hardness: 6-7 (Mohs), Color: Mottled green (epidote), pink (orthoclase feldspar), and clear/grey (quartz), Luster: Vitreous to dull, Crystal structure: Massive/granular
Formation & geological history
Formed through the hydrothermal metamorphism of granite, where plagioclase feldspar is replaced by green epidote. Often found as pebbles and boulders in glacial till or riverbeds.
Uses & applications
Commonly used as a lapidary stone for beads, cabochons, and decorative carvings. Used also in landscaping and as a semiprecious gemstone in jewelry.
Geological facts
Named after the Unaka Range in North Carolina, USA, where it was first discovered. It is the state rock of Virginia. Its distinctive pink and green combination makes it a popular stone for beginners in rock tumbling.
Field identification & locations
Identify in the field by its distinct pink 'Salmon' colored patches mixed with pistachio-green mineral grains. Commonly found in the Blue Ridge Mountains and around the Great Lakes.
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