metamorphic

Unakite (likely)

Epidote–feldspar–quartz rock; unakite is altered granitic rock, commonly containing epidote, pink orthoclase, and quartz.

AI-generated identification · may be incorrect

The specimen appears mottled green-gray with reddish-pink patches and a weathered surface. Typical unakite has Mohs hardness about 6–7, vitreous to dull luster, and no consistent cleavage as a whole rock; the photo alone cannot confirm its minerals.

Identified September 28, 2026More metamorphic →

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Physical properties

Formation & geological history

Forms when granitic rock is altered by hydrothermal fluids, converting some feldspar to epidote; this alteration is typically Precambrian, though the specimen’s age and source cannot be determined from the image.

Uses & applications

Used as a decorative stone, in beads and cabochons, and as a lapidary or collector specimen; usually not an important construction stone.

Geological facts

Unakite is named for the Unaka Mountains of the southeastern United States, where it was first described.

Field identification & locations

Look for distinctive mottling of green epidote, pink feldspar, and often quartz; compare fresh surfaces, since weathering can mute colors. Similar-looking altered granite occurs in many regions, so locality or mineral testing is needed for a firm identification.