metamorphic
Unakite (Epidote with Quartz and Feldspar)
Unakite (Metasomatized Granitic Rock)
Hardness: 6-7 (Mohs); Color: Mottled green (epidote), pink (orthoclase feldspar), and clear/white (quartz); Luster: Vitreous to dull; Crystal structure: Monoclinic/Hexagonal components; Specific gravity: 2.85-3.20.
- Hardness
- 6-7 (Mohs)
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 (Mohs); Color: Mottled green (epidote), pink (orthoclase feldspar), and clear/white (quartz); Luster: Vitreous to dull; Crystal structure: Monoclinic/Hexagonal components; Specific gravity: 2.85-3.20.
Formation & geological history
Formed through the hydrothermal alteration of granite where plagioclase feldspar is replaced by epidote. Often found in mountain ranges such as the Blue Ridge Mountains in the USA.
Uses & applications
Commonly used as a decorative stone for lapidary work, cabochons, beads, and architectural stone. It is also a popular healing crystal in metaphysical practices.
Geological facts
Unakite was first discovered in the Unaka Range of North Carolina, after which it is named. It is the state rock of Virginia.
Field identification & locations
Identify in the field by its distinct 'pistachio green' and 'salmon pink' mottled appearance. It is often found as pebbles in stream beds where granite outcrops have eroded.
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