mineral

Polished brecciated jasper (likely)

Jasper, microcrystalline quartz (SiO₂), with contrasting mineral fragments or veins

AI-generated identification · may be incorrect

Opaque, polished pebble with reddish-brown and olive-gray patches; quartz has Mohs hardness 6.5–7, vitreous to waxy luster, and no visible cleavage. The photo is too small to identify the exact variety confidently.

Identified October 6, 2026More mineral →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids fill cavities or replace sediment, often preserving iron-rich colors and brecciated patterns. Its age depends on the source deposit and cannot be determined from the image.

Uses & applications

Used for beads, cabochons, ornaments, and small polished collectibles; not generally used as structural stone.

Geological facts

Jasper is a variety of chalcedony, composed of microscopic quartz crystals; its patterns and colors vary widely with included minerals and iron oxides.

Field identification & locations

Look for an opaque, hard, fine-grained surface that resists scratching by a steel blade; reddish and greenish patches may indicate iron-bearing material. Jasper occurs worldwide, but the specific locality cannot be inferred here.