mineral

Polished brecciated jasper (likely)

Brecciated jasper, an opaque microcrystalline quartz (SiO₂) with contrasting silica-rich fragments and matrix

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; mottled gray, mauve, cream, and dark patches with a polished, waxy-to-glassy luster. Quartz is trigonal and lacks cleavage; the visible angular fragments suggest a brecciated texture. The exact identification is uncertain from the image alone.

Identified September 22, 2026More mineral →

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Physical properties

Formation & geological history

Silica-rich fluids or sediments filled and cemented fractures in older rock, later silicifying the fragments. Jasper deposits form in varied geological settings and may be of many ages.

Uses & applications

Used for beads, cabochons, ornaments, and lapidary pieces; not usually valued as an industrial stone.

Geological facts

“Brecciated” describes angular rock fragments cemented together; polishing emphasizes the contrasting fragments and matrix.

Field identification & locations

Look for opaque, hard material with angular contrasting patches and a smooth polish; quartz-rich jasper occurs worldwide. A close-up or hardness test would help distinguish it from other polished breccias.