metamorphic
Unakite (Tumbled)
Unakite (altered granite)
Hardness: 6-7 (Mohs); Color: Mottled green (epidote), pink (orthoclase), and clear/gray (quartz); Luster: Vitreous to dull; Crystal structure: Monoclinic/Hexagonal components; Cleavage: None (fractures irregularly); Specific gravity: 2.85-3.26.
- Hardness
- 6-7 (Mohs)
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 (Mohs); Color: Mottled green (epidote), pink (orthoclase), and clear/gray (quartz); Luster: Vitreous to dull; Crystal structure: Monoclinic/Hexagonal components; Cleavage: None (fractures irregularly); Specific gravity: 2.85-3.26.
Formation & geological history
Formed via hydrothermal metamorphism of granite, where plagioclase feldspar is replaced by green epidote. Most common in the Unaka Range of the Blue Ridge Mountains, USA. Geological age varies by location, often Precambrian.
Uses & applications
Used primarily as a decorative stone, in lapidary work for cabochons and beads, architectural trim, and as a popular stone for crystal healing collectors.
Geological facts
It was first discovered in the Unaka Range in North Carolina/Tennessee, USA, for which it is named. It is also the state rock of Virginia.
Field identification & locations
Identify by its unique pistachio-green and salmon-pink mottled appearance. Often found in riverbeds and gravel pits in areas with metamorphic basement rock. Collectors often seek stones with an даже balance of both colors.
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