metamorphic
Unakite (likely)
Epidote–K-feldspar–quartz metamorphic rock
AI-generated identification · may be incorrectPink salmon-colored feldspar, pistachio-green epidote, and translucent gray quartz form a mottled texture; typically Mohs 6–7, opaque to slightly translucent, with a vitreous to dull luster and no obvious cleavage on the rounded surface.
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Physical properties
Pink salmon-colored feldspar, pistachio-green epidote, and translucent gray quartz form a mottled texture; typically Mohs 6–7, opaque to slightly translucent, with a vitreous to dull luster and no obvious cleavage on the rounded surface.
Formation & geological history
Usually formed by hydrothermal alteration of granite, replacing plagioclase with epidote and potassium feldspar; commonly Precambrian to Paleozoic in age, depending on locality.
Uses & applications
Used as a decorative stone, cabochon, bead, carving material, and polished lapidary stone; generally not important for construction at specimen scale.
Geological facts
The pink-and-green color combination is its key hallmark. This specimen appears naturally weathered or lightly tumbled, so mineral boundaries are less sharply visible.
Field identification & locations
Identify by the distinctive pink feldspar–green epidote pattern and granular texture; common sources include the Unaka Mountains of Tennessee and North Carolina, Brazil, South Africa, and China. A firm identification would benefit from a fresh surface or hardness testing.
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