metamorphic
Unakite
Altered granitic rock composed of pink orthoclase feldspar, green epidote, and quartz
AI-generated identification · may be incorrectHardness of 6 to 7 on the Mohs scale, with a vitreous to dull luster and a distinct mottled green and pink color. It exhibits an amorphous to microcrystalline structure with no prominent cleavage.
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 of 6 to 7 on the Mohs scale, with a vitreous to dull luster and a distinct mottled green and pink color. It exhibits an amorphous to microcrystalline structure with no prominent cleavage.
Formation & geological history
Formed through the hydrothermal alteration of granite, where hot fluids alter original plagioclase feldspar into epidote. This metamorphic process typically occurs in ancient mountain-building events.
Uses & applications
Widely utilized as a decorative stone for lapidary work, cabochons, beads, and carved spheres. It is also popular among mineral collectors.
Geological facts
First discovered in the Unaka Mountains of North Carolina, which is how this distinctive rock derived its name. It is often found as pebbles and cobbles in glacial drift and river beds.
Field identification & locations
Easily identified in the field by its striking color combination of pistachio green and salmon pink. Common localities include the Blue Ridge Mountains in the USA, South Africa, and Brazil.
More like this
