mineral

Tumbled orange-brown jasper

Jasper, an opaque, iron-rich variety of microcrystalline quartz (SiO₂)

AI-generated identification · may be incorrect

Likely Mohs hardness 6.5–7; orange, brown, and gray mottling; dull to waxy luster when polished; trigonal quartz structure, with no visible cleavage and conchoidal fracture. The image suggests a tumbled stone, but exact identification is uncertain from appearance alone.

Identified October 16, 2026More mineral →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids fill cavities or replace material in sedimentary or volcanic rocks; iron oxides create its colors. Deposits occur across many geological ages and settings.

Uses & applications

Used for beads, cabochons, carvings, and decorative objects; generally not used as a major construction material.

Geological facts

Jasper is valued for varied patterns and colors, and may be sold under locality or trade names.

Field identification & locations

A glassy shine, opaque interior, and hardness sufficient to scratch glass can support identification; commonly found in silica-rich veins and nodules worldwide. Orange-brown appearance alone cannot distinguish jasper from other iron-stained stones.