mineral

Possible tumbled jasper or iron-rich chert

Microcrystalline quartz (SiO₂), commonly colored by iron oxides

AI-generated identification · may be incorrect

Opaque reddish-brown, fine-grained, dull to slightly waxy luster, with pale speckling and rounded abrasion surfaces. Estimated Mohs hardness 6.5–7; no visible cleavage; conchoidal fracture is typical, though the specimen appears worn or shaped.

Identified August 20, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed as silica-rich sediment or volcanic material later impregnated by iron oxides, then weathered and naturally or artificially rounded. Such silica deposits commonly range from Paleozoic to Cenozoic age depending on locality.

Uses & applications

Used as ornamental stone, cabochons, beads, carvings, and tumbled specimens; harder jasper varieties can serve as minor lapidary material.

Geological facts

Jasper is an opaque variety of chalcedony or microcrystalline quartz, and its red-brown color commonly reflects hematite or goethite. The image alone cannot distinguish jasper confidently from iron-rich chert or a manufactured stone.

Field identification & locations

Look for hardness sufficient to scratch glass, a quartz-like conchoidal fracture, and lack of fizzing in dilute acid. Common sources include India, Madagascar, Brazil, Australia, and the western United States.