metamorphic
Unakite
Epidotized Granite
Hardness: 6-7 (Mohs scale), Color: Mottled green (epidote) and pink (orthoclase feldspar), Luster: Vitreous to dull, Crystal structure: Granular/Massive, Specific gravity: 2.85-3.20.
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Physical properties
Hardness: 6-7 (Mohs scale), Color: Mottled green (epidote) and pink (orthoclase feldspar), Luster: Vitreous to dull, Crystal structure: Granular/Massive, Specific gravity: 2.85-3.20.
Formation & geological history
Formed through the hydrothermal metamorphism of granite, where plagioclase feldspar is replaced by epidote. Usually associated with ancient mountain-building events.
Uses & applications
Commonly used for lapidary work, cabochons, beads for jewelry, stone carvings, and architectural decorative stone.
Geological facts
Unakite was first discovered in the Unaka Range of the Blue Ridge Mountains in the United States, which is how it received its name.
Field identification & locations
Identify by its unique pistachio-green and salmon-pink mottled appearance. It is commonly found as river stones and pebbles in North Carolina and Virginia, as well as the shores of Lake Superior.
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