metamorphic
Polished unakite pendant
Unakite: quartz + epidote + pink potassium feldspar
AI-generated identification · may be incorrectHardness about 6–7 Mohs; mottled pistachio-green and salmon-pink colors, glassy to greasy luster, granular interlocking crystals, and no prominent cleavage visible because it is polished. The metal bail and chain are jewelry fittings, not part of the specimen.
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Physical properties
Hardness about 6–7 Mohs; mottled pistachio-green and salmon-pink colors, glassy to greasy luster, granular interlocking crystals, and no prominent cleavage visible because it is polished. The metal bail and chain are jewelry fittings, not part of the specimen.
Formation & geological history
Unakite forms when granite undergoes hydrothermal alteration, replacing minerals with epidote while preserving quartz and feldspar; it is generally Paleozoic to Precambrian in age. Classic material occurs in the Unaka Mountains of Tennessee and North Carolina, USA, with similar rock found worldwide.
Uses & applications
Commonly cut into beads, cabochons, pendants, and carvings; it has modest ornamental and collector value rather than major industrial importance.
Geological facts
Its distinctive pink-and-green pattern results from salmon feldspar intergrown with green epidote and quartz. It is often marketed as a decorative gemstone despite being a rock rather than a single mineral.
Field identification & locations
Identify it by the opaque mottled pink-green pattern, moderate density, and hardness sufficient to scratch glass; distinguish it from dyed jasper or serpentine by its granular texture and quartz sparkle. Common sources include the southeastern United States, Brazil, South Africa, and China.
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