metamorphic
Unakite
Unakite (Epidotized Granite)
Hardness: 6-7 Mohs; Color: Mottled green (epidote) and pink (orthoclase feldspar); Luster: Vitreous to dull; Crystal structure: Monoclinic/Triclinic mixture; Specific Gravity: 2.85-3.20
- Hardness
- 6-7 Mohs
- Color
- Mottled green (epidote) and pink (orthoclase feldspar)
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 Mohs; Color: Mottled green (epidote) and pink (orthoclase feldspar); Luster: Vitreous to dull; Crystal structure: Monoclinic/Triclinic mixture; Specific Gravity: 2.85-3.20
Formation & geological history
Formed through hydrothermal metamorphism of granite where plagioclase feldspar is replaced by epidote. Primarily Precambrian in age.
Uses & applications
Commonly used as a decorative stone, in lapidary work for cabochons and beads, and as a semi-precious gemstone in jewelry and carvings.
Geological facts
Named after the Unaka Range of North Carolina, USA, where it was first discovered. It is often considered a balancing stone in metaphysical circles.
Field identification & locations
Identify by the distinct mottled combination of pistachio-green and salmon-pink. Found in river beds and shorelines, especially in the Blue Ridge Mountains and Lake Superior.
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