metamorphic
Unakite
Altered Granite (Epidotized Granite)
Hardness: 6-7 on the Mohs scale; Color: Mottled green and pink/red; Luster: Vitreous to dull; Crystal structure: Monoclinic and triclinic constituents; Cleavage: Good in two directions for feldspars; Specific gravity: 2.5-3.0
- Hardness
- 6-7 on the Mohs scale
- Color
- Mottled green and pink/red
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on the Mohs scale; Color: Mottled green and pink/red; Luster: Vitreous to dull; Crystal structure: Monoclinic and triclinic constituents; Cleavage: Good in two directions for feldspars; Specific gravity: 2.5-3.0
Formation & geological history
Formed through the hydrothermal alteration of granite, where plagioclase feldspar is replaced by epidote, orthoclase, and quartz. Geological age varies widely depending on the host granite formation, often Precambrian to Paleozoic.
Uses & applications
Commonly used for tumbled stones, cabochons, carved decorative objects, beads, and lapidary art.
Geological facts
Unakite was first discovered in the Unakas Mountains of North Carolina, from which it derives its name. It is a composite rock consisting mainly of pink orthoclase feldspar, green epidote, and clear quartz.
Field identification & locations
Easily identified by its distinct and striking combination of salmon-pink and pistachio-green patches. Found globally including in the USA, South Africa, Brazil, and China. Popular among crystal healers and amateur lapidary enthusiasts.
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