mineral

Tumbled jasper (likely brecciated or multicolored jasper)

Microcrystalline quartz/chalcedony, SiO₂; jasper is an impure, opaque variety

AI-generated identification · may be incorrect

Opaque cream, yellow, gray, and reddish-brown mottling with a polished surface; Mohs hardness about 6.5–7, vitreous to waxy luster, no visible crystal faces, and no cleavage. The image alone cannot confirm the exact jasper variety.

Identified October 13, 2026More mineral →

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Physical properties

Formation & geological history

Silica-rich fluids deposited and replaced material in rock cavities or fractures; iron and other impurities produce the colors. Jasper forms in varied geological settings and ages.

Uses & applications

Used for beads, cabochons, ornaments, and lapidary work; generally valued as a decorative stone rather than an industrial material.

Geological facts

Jasper is a broad lapidary term for opaque, colored chalcedony; patterns and names often reflect appearance or locality rather than a distinct mineral species.

Field identification & locations

Its opacity, mottled color, and hardness are typical of jasper; it is commonly found in silica-rich veins and volcanic terrains worldwide. A small tumbled piece is usually worth about $1–$10 USD.