igneous
Unakite
Altered Granite (composed of orthoclase feldspar, green epidote, and quartz)
Hardness of 6 to 7 on the Mohs scale, mottled green and pink/reddish-brown color, vitreous to greasy luster, massive crystal structure with no distinct cleavage, specific gravity of approximately 2.8 to 3.0.
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Physical properties
Hardness of 6 to 7 on the Mohs scale, mottled green and pink/reddish-brown color, vitreous to greasy luster, massive crystal structure with no distinct cleavage, specific gravity of approximately 2.8 to 3.0.
Formation & geological history
Formed by the hydrothermal alteration of granitic rocks, where calcium-rich plagioclase is replaced by epidote. Associated with orogenic belts and ancient cratons.
Uses & applications
Used primarily in lapidary arts for making cabochons, beads, carved spheres, tumbled stones, and ornamental architectural tiles.
Geological facts
Unakite was first discovered in the Unaka Mountains of western North Carolina, from which it derives its name. It is a popular metaphysical stone believed by some to promote emotional balance.
Field identification & locations
Easily identified in the field by its distinct, striking combination of pink orthoclase feldspar and pistachio-green epidote. Commonly found in glacial drift in the Blue Ridge Mountains of the United States, as well as South Africa, Brazil, and China.
