Rock Identifier
Likely tumbled jasper or iron-rich quartzite (Microcrystalline quartz (SiO₂), possibly hematite/goethite-bearing) — mineral
mineral

Likely tumbled jasper or iron-rich quartzite

Microcrystalline quartz (SiO₂), possibly hematite/goethite-bearing

AI-generated identification · may be incorrect

Small rounded brown-orange specimen with earthy to slightly waxy luster; likely hardness 6.5–7 Mohs, opaque to weakly translucent, with no obvious cleavage. Exact identification is limited by the image’s size and lighting.

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Physical properties

Small rounded brown-orange specimen with earthy to slightly waxy luster; likely hardness 6.5–7 Mohs, opaque to weakly translucent, with no obvious cleavage. Exact identification is limited by the image’s size and lighting.

Formation & geological history

Forms when silica-rich fluids deposit and replace rock, with iron oxides producing the reddish-brown color; deposits range from Precambrian to recent. It appears polished or naturally rounded rather than freshly broken.

Uses & applications

Commonly sold as a tumbled collectible, worry stone, or cabochon material; jasper and quartzite are also used for beads, carvings, and decorative stone.

Geological facts

Iron staining commonly creates red, orange, yellow, and brown patterns in jasper. It will generally scratch glass, unlike calcite or most soft brown rocks.

Field identification & locations

Look for a very fine-grained texture, consistent color, glassy-to-waxy fracture, and resistance to scratching; a streak, hardness, and specific-gravity test would distinguish jasper from iron-rich minerals. Common worldwide, especially in volcanic and sedimentary silica deposits.