metamorphic

Unakite (likely)

Epidote–orthoclase–quartz rock; composition approximately epidote Ca₂(Al,Fe³⁺)₃(SiO₄)₃(OH) plus K-feldspar and quartz

AI-generated identification · may be incorrect

Pink salmon areas are orthoclase feldspar, green patches are epidote, and translucent grains are quartz; mottled, granular texture with vitreous to dull luster. Hardness is roughly 6–7 Mohs, with no prominent cleavage visible in the rounded specimen.

Identified September 3, 2026More metamorphic →

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At a glance

Common name: Unakite (likely)
Scientific name: Epidote–orthoclase–quartz rock; composition approximately epidote Ca₂(Al,Fe³⁺)₃(SiO₄)₃(OH) plus K-feldspar and quartz
Category: metamorphic
Identified: September 3, 2026
Method: Standard

AI Estimated Value

About $3–$15 for a common palm-sized rough or tumbled piece; attractive polished specimens or carvings may sell for $20–$75.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Usually forms by hydrothermal alteration or low-grade metamorphism of granite, during which feldspar is altered to epidote and quartz. It is commonly associated with older Precambrian to Paleozoic crystalline rocks, though age depends on locality.

Uses & applications

Popular as tumbled stone, cabochons, beads, carvings, and ornamental stone; it has limited industrial use because of its variable composition and modest hardness.

Geological facts

The specimen’s pink-and-green pattern is characteristic of unakite, but similar epidote-bearing granite can look nearly identical. Polishing strongly enhances its contrasting colors.

Field identification & locations

Identify it by the distinctive salmon-pink feldspar and pistachio-green epidote intergrowth, granular texture, and lack of banding; common sources include the Unaka Mountains of North Carolina/Tennessee, Brazil, South Africa, and China.