Metamorphic
Unakite
Epidotized Granite
Hardness: 6-7, Color: mottled green and pink/red, Luster: dull to vitreous, Crystal structure: massive, Cleavage: poor, Specific gravity: 2.8-3.2
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Physical properties
Hardness: 6-7, Color: mottled green and pink/red, Luster: dull to vitreous, Crystal structure: massive, Cleavage: poor, Specific gravity: 2.8-3.2
Formation & geological history
Formed when granite is altered by hydrothermal activity, causing plagioclase feldspar to be replaced by epidote.
Uses & applications
Used in jewelry, lapidary arts, and as a decorative stone.
Geological facts
Named after the Unaka mountain range in North Carolina where it was first discovered.
Field identification & locations
Identified by its distinctive mottled green (epidote) and pink (orthoclase feldspar) appearance. Common in glacial drift around the Great Lakes.
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