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Unakite is coarse-grained granite, an igneous rock that undergoes metamorphism that later reveals pink orthoclase feldspar, green epidote, and clear quartz. It is a metamorphic rock that is formed when granite is altered through hydrothermal activity. During the metamorphism process, the plagioclase in the granite is replaced by epidote. Unakite can be found in deformed rocks at convergent plate boundaries where granites formed deep within the earth are metamorphosed and then later exposed through weathering and erosion. It can also occur where nearby fractures deliver hydrothermal fluids that alter the granite.

On the Mohs scale of mineral hardness Unakite grades at a 6 to 7.

Unakite is usually mined from secondary deposits, and most of it that are currently on the market is actually pebbles gathered from the shores of Lake Superior. Other deposits are found in river valleys after being washed downstream from their primary deposit in the mountains. The most notable deposits of Unakite are found in the United States (Tennessee, North Carolina, Virginia, and along the shores of Lake Superior). Other Deposits have also been discovered in Brazil, China, Sierra Leone, and South Africa.

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