mineral

Likely tumbled epidote-bearing rock or green jasper

Epidote-group silicate, possibly in a jasper or serpentinite matrix

AI-generated identification · may be incorrect

Small polished/tumbled pebble with dark olive-green, brown, and rusty-red areas; opaque, vitreous-to-waxy luster. Epidote has Mohs hardness 6–7, while jasper is about 6.5–7; crystal structure is typically not visible.

Identified August 20, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed by hydrothermal alteration or metamorphism of iron- and calcium-rich rocks; the specimen’s geological age cannot be determined from the photograph. Tumbled surfaces indicate human processing.

Uses & applications

Used mainly as a collector specimen or lapidary stone; suitable material may be made into cabochons, beads, and decorative objects, but it has little industrial value.

Geological facts

Epidote commonly produces pistachio-green coloration, whereas iron oxides create the reddish-brown patches. Similar-looking stones include unakite, rainforest jasper, and serpentine.

Field identification & locations

Identify by its green-and-rust coloration, opaque body, polish, and hardness; a streak, specific-gravity test, and close inspection for epidote crystals would help distinguish it. Epidote occurs widely in metamorphic terrains, including Austria, Pakistan, Mexico, and the United States.