metamorphic
Unakite
Unakite (Epidotized Granite)
Hardness: 6-7 Mohs; Color: Mottled green, pink, and orange-red; Luster: Vitreous to dull; Crystal structure: Monoclinic/Triclinic mix; Specific Gravity: 2.85-3.20.
- Hardness
- 6-7 Mohs
- Color
- Mottled green, pink, and orange-red
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 Mohs; Color: Mottled green, pink, and orange-red; Luster: Vitreous to dull; Crystal structure: Monoclinic/Triclinic mix; Specific Gravity: 2.85-3.20.
Formation & geological history
Formed through the hydrothermal metamorphism of granite, where plagioclase feldspar is replaced by epidote. Primarily found in the Blue Ridge Mountains of the USA.
Uses & applications
Used widely for lapidary work, decorative cabochons, beads, architectural stone, and as a popular semi-precious stone for metaphysical collecting.
Geological facts
It was first discovered in the Unaka Range of the mountains in North Carolina, which is how it received its name. It is the state rock of Virginia.
Field identification & locations
Identify by its distinctive pistachio-green (epidote) and salmon-pink (orthoclase feldspar) mottled appearance. Common in riverbeds in the Blue Ridge area and along the shores of Lake Superior as glacial drift.
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