metamorphic

Polished brecciated jasper

Silica-rich microcrystalline quartz (SiO₂), likely brecciated jasper with iron-oxide staining

AI-generated identification · may be incorrect

Opaque, polished, mottled cream, reddish-brown, and gray; quartz hardness 6.5–7 Mohs, vitreous to waxy luster, cryptocrystalline structure, and no visible cleavage. The pattern suggests angular fragments cemented by silica, though a photo cannot confirm the exact variety.

Identified September 28, 2026More metamorphic →

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Physical properties

Formation & geological history

Silica-rich fluids cemented fractured rock fragments; iron oxides produced the reddish-brown colors. Jasper deposits formed in varied geological settings and ages, commonly during volcanic or sedimentary processes.

Uses & applications

Used for lapidary cabochons, beads, ornaments, and collecting; not generally an industrial stone in this small polished form.

Geological facts

Jasper is an opaque variety of chalcedony, and its colors and breccia-like patterns vary widely.

Field identification & locations

Look for opaque silica-rich material with a smooth polish, hardness near 7, and irregular contrasting patches; jasper is found worldwide. A hand-sized tumbled or polished piece like this commonly sells for about $3–$15.