mineral

Polished/tumbled jasper (likely ocean or brecciated jasper)

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and darker mineral inclusions

AI-generated identification · may be incorrect

Opaque, orange-red and cream coloration with black-green inclusions; waxy to glassy luster and irregular conchoidal fracture. Mohs hardness is about 6.5–7; no visible cleavage; specific gravity roughly 2.6.

Identified August 29, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich groundwater fills cavities or replaces volcanic and sedimentary material, with iron oxides producing the red-orange color. Jasper deposits are generally associated with ancient volcanic or hydrothermal environments, though the specimen’s age cannot be determined visually.

Uses & applications

Used for cabochons, beads, carvings, ornamental objects, and inexpensive polished stones; rarely used industrially because of its attractive rather than structural properties.

Geological facts

The specimen appears rounded and polished, so its original textures and boundaries are obscured. Dark patches may represent breccia fragments, manganese minerals, or other rock inclusions.

Field identification & locations

Identify jasper by its opacity, strong earthy colors, fine-grained texture, and lack of visible individual crystals; it should resist scratching from ordinary steel. Common sources include Oregon, California, Idaho, Brazil, Madagascar, and Australia.