mineral

Polished orbicular jasper (likely ocean jasper)

Silica-rich chalcedony/quartz (SiO₂), with possible iron-oxide and other mineral inclusions

AI-generated identification · may be incorrect

Tumbled and polished, with gray-green, cream, and rusty patches; the visible pattern is consistent with jasper or brecciated chalcedony. Quartz-group hardness is about 6.5–7 Mohs, with a vitreous to waxy luster and no prominent cleavage; exact composition cannot be confirmed from the photo.

Identified September 29, 2026More mineral →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids fill cavities or replace rock, with colors and patterns from mineral impurities. The specimen’s age and precise source cannot be determined visually.

Uses & applications

Used for beads, cabochons, carvings, and decorative collectibles.

Geological facts

“Ocean jasper” is a trade name for patterned jasper, especially material from Madagascar; similar-looking jaspers occur elsewhere.

Field identification & locations

Look for opaque-to-translucent silica with irregular color patches and a smooth polish; a hardness or close-up examination can help distinguish it from other patterned stones. The small polished specimen has no diagnostic locality features.