metamorphic
Unakite
Unakite (Epidotized Granite)
Hardness: 6-7 (Mohs), Color: Mottled green, pink, and gray, Luster: Vitreous to dull, Crystal Structure: Monoclinic/Hexagonal (mixed minerals), Cleavage: Poor, Specific Gravity: 2.85-3.20
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Physical properties
Hardness: 6-7 (Mohs), Color: Mottled green, pink, and gray, Luster: Vitreous to dull, Crystal Structure: Monoclinic/Hexagonal (mixed minerals), Cleavage: Poor, Specific Gravity: 2.85-3.20
Formation & geological history
Formed through the hydrothermal alteration of granite, where plagioclase feldspar is replaced by epidote. Usually associated with Precambrian or Paleozoic metamorphic terrains.
Uses & applications
Primarily used as a decorative stone, semi-precious gemstone for cabochons and beads, and sometimes in architectural landscaping or tiles.
Geological facts
Named after the Unaka Range in North Carolina, USA, where it was first discovered. It is often considered a healing stone in metaphysical circles representing balance.
Field identification & locations
Identified by its distinctive salmon-pink orthoclase and pistachio-green epidote patches. Commonly found in riverbeds as pebbles in the Blue Ridge Mountains of the USA.
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