sedimentary

Orange chert (likely jasper)

Microcrystalline quartz (SiO₂), iron-oxide stained; jasper is an opaque variety of chert

AI-generated identification · may be incorrect

Small rough fragment with orange-red and cream coloration and a dull to slightly waxy surface. Quartz hardness is about 7 Mohs; it has no visible crystal structure and typically breaks with a curved, conchoidal fracture.

Identified October 13, 2026More sedimentary →

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Physical properties

Formation & geological history

Forms when silica-rich sediment or chemical precipitates become microcrystalline quartz; iron oxides can create orange-red colors. Chert occurs in rocks of many ages, so this fragment’s age and exact origin cannot be determined from the image.

Uses & applications

Chert has historically been used for tools and fire-starting; attractive jasper is used for cabochons, beads, and decorative objects.

Geological facts

Jasper is essentially opaque, colored chert; its hues often come from iron-bearing impurities.

Field identification & locations

The color and appearance suggest jasper, but the small fragment is not diagnostic. Check for a very hard surface and sharp, curved fracture; chert is widespread in sedimentary settings.