metamorphic
Unakite
Altered Granite
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, mottled green and pink color, vitreous to dull luster, granular crystal structure, specific gravity around 2.8-3.0.
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Physical properties
Hardness of 6-7 on the Mohs scale, mottled green and pink color, vitreous to dull luster, granular crystal structure, specific gravity around 2.8-3.0.
Formation & geological history
Formed by hydrothermal alteration of granite, where plagioclase feldspar is replaced by epidote, typically occurring in ancient orogenic belts.
Uses & applications
Used primarily for making tumbled stones, cabochons, beads, decorative carvings, and architectural tiles.
Geological facts
Unakite was first discovered in the Unaka Mountains of North Carolina, which is how this distinctive green and pink rock got its name.
Field identification & locations
Easily identified by its characteristic combination of pink orthoclase feldspar, green epidote, and clear quartz; commonly found in glacial drift and river gravels.
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