metamorphic
Unakite
Unakite (Epidotized Granite)
Hardness: 6-7 Mohs; Color: Mottled green, pink, and gray/white; Luster: Vitreous to dull; Crystal structure: Monoclinic/Trigonal mix; Cleavage: Poor; Specific Gravity: 2.85-3.2
- Hardness
- 6-7 Mohs
- Color
- Mottled green, pink, and gray/white
- Luster
- Vitreous to dull
Identified More metamorphic →
Explore Unakite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-7 Mohs; Color: Mottled green, pink, and gray/white; Luster: Vitreous to dull; Crystal structure: Monoclinic/Trigonal mix; Cleavage: Poor; Specific Gravity: 2.85-3.2
Formation & geological history
Formed through the hydrothermal metamorphism of granite, where plagioclase feldspar is replaced by green epidote. It is commonly found in Proterozoic era rock formations.
Uses & applications
Used primarily as a semi-precious gemstone for jewelry, cabochons, beads, architectural trim, and decorative carvings.
Geological facts
It was first discovered in the Unaka Range of North Carolina, USA, which is where it gets its name. It is also often found as pebbles in glacial drift around the Great Lakes.
Field identification & locations
Identify by its distinctive pistachio-green and salmon-pink 'meat and greens' mottled appearance. Commonly found in river beds and Blue Ridge Mountain regions.
More like this
