metamorphic
Unakite (likely epidote–feldspar rock)
Epidote–K-feldspar–quartz aggregate; commonly approximated as pink orthoclase/microcline + green epidote + quartz
AI-generated identification · may be incorrectTypically Mohs 6–7; mottled salmon-pink and pistachio-green, with vitreous to dull luster and granular texture. The colors reflect intergrown feldspar and epidote, commonly with minor quartz; cleavage is inherited from feldspar but obscured in the massive rock.
Identified More metamorphic →
Explore Unakite (likely epidote–feldspar rock) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Typically Mohs 6–7; mottled salmon-pink and pistachio-green, with vitreous to dull luster and granular texture. The colors reflect intergrown feldspar and epidote, commonly with minor quartz; cleavage is inherited from feldspar but obscured in the massive rock.
Formation & geological history
Forms when granitic or related igneous rocks undergo hydrothermal alteration or low-grade metamorphism, replacing minerals with epidote while preserving feldspar. It is generally Paleozoic to Precambrian in source terrains, though exact age requires locality data.
Uses & applications
Used as a decorative stone, lapidary material, beads, cabochons, carvings, and polished countertops; it has modest collector value rather than major gemstone value.
Geological facts
The specimen’s coarse, strongly mottled pink-and-green appearance is characteristic of unakite, though similar epidote-rich altered granite can be sold under that name.
Field identification & locations
Identify by the interlocking pink feldspar and dark green epidote, granular rather than glassy texture, and hardness sufficient to scratch ordinary glass. Classic material occurs in the Unaka Mountains of North Carolina and Tennessee, with similar rock worldwide.
More like this
