mineral

Red jasper (likely iron-rich chalcedony/jasper)

Jasper, microcrystalline quartz (SiO₂), colored mainly by hematite/goethite

AI-generated identification · may be incorrect

Opaque to slightly translucent, deep brick-red to burgundy, waxy-to-glassy luster, massive cryptocrystalline structure, no visible cleavage, and conchoidal fracture. Quartz hardness is about 6.5–7 Mohs; typical specific gravity is 2.55–2.70.

Identified August 12, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich groundwater replaces or fills cavities in volcanic rocks and sediments, with iron oxides producing the red color. It commonly formed during multiple ancient hydrothermal or sedimentary events; an exact age cannot be determined from the photograph.

Uses & applications

Used for cabochons, beads, carvings, ornamental objects, and polished slabs; occasionally used as a durable decorative stone. Common rough pieces generally have modest commercial value.

Geological facts

The glossy surfaces may be natural fracture faces or partly polished/coated surfaces. The specimens could also be red agate or heavily iron-stained chalcedony; laboratory testing is needed for certainty.

Field identification & locations

Likely identification requires a scratch test: it should scratch ordinary glass but not be scratched by a steel knife. It is plausible near northern Iran, where silica veins, volcanic rocks, and iron-rich jasper/chalcedony occur, though the exact locality cannot be confirmed visually.