metamorphic
Unakite
Epidotized Granite
Hardness: 6-7 (Mohs), Color: Mottled green (epidote), pink (orthoclase), and clear/grey (quartz), Luster: Vitreous to dull, Crystal Structure: Monoclinic/Triclinic mixture, Cleavage: Poor, Specific Gravity: 2.85-3.20
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 (epidote), pink (orthoclase), and clear/grey (quartz), Luster: Vitreous to dull, Crystal Structure: Monoclinic/Triclinic mixture, Cleavage: Poor, Specific Gravity: 2.85-3.20
Formation & geological history
Formed through the hydrothermal metamorphism of granite, where plagioclase feldspar is replaced by epidote. It is associated with tectonic activities and is commonly found as river pebbles or cobbles in areas of glacial drift.
Uses & applications
Commonly used as a decorative stone, in lapidary work for cabochons and beads, and as an architectural stone for carvings and tiles. It is also popular in holistic practices and as a gemstone for jewelry.
Geological facts
Unakite was first discovered in the Unaka Range of the Appalachian Mountains in the United States, which is how it received its name. It is the state rock of Virginia.
Field identification & locations
Identified by its distinctive 'salmon and moss' color combination. Look for pink and green mottled patterns in stream beds or gravel pits in the Appalachian region or glacial areas.
