metamorphic
Unakite
Epidotized Granite
Hardness: 6–7 Mohs; Color: Mottled green (epidote) and pink/peach (orthoclase feldspar) with minor quartz; Luster: Dull to vitreous; Crystal system: Monoclinic/Triclinic; Specific gravity: 2.85–3.20.
- Hardness
- 6–7 Mohs
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6–7 Mohs; Color: Mottled green (epidote) and pink/peach (orthoclase feldspar) with minor quartz; Luster: Dull to vitreous; Crystal system: Monoclinic/Triclinic; Specific gravity: 2.85–3.20.
Formation & geological history
Formed through hydrothermal metamorphism of granite, where plagioclase feldspar is replaced by epidote. Generally associated with the Precambrian period (over 1 billion years old).
Uses & applications
Commonly used in jewelry (cabochons and beads), decorative carvings, architecture, and lapidary tumbling. It is also a popular stone in metaphysical collecting.
Geological facts
Unakite was first discovered in the Unaka Range of North Carolina, USA, which is its namesake. It is often found as river pebbles and is the state rock of Virginia.
Field identification & locations
Identify by its distinctive pistachio-green and salmon-pink mottled appearance. It can be found in riverbeds and on the shores of Lake Superior. Collectors look for a balanced mix of colors without cracks.
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