mineral

Polished yellow-orange jasper (likely)

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides

AI-generated identification · may be incorrect

Smooth, polished, opaque orange-yellow with brown mottling and a waxy-to-glassy luster. Quartz hardness is 7 Mohs; crystals are microscopic, with no visible cleavage. Identification from the image is tentative.

Identified October 16, 2026More mineral →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids fill cavities or replace rock, with iron oxides producing its colors. It occurs in many geological ages and settings; the specimen’s exact source and age cannot be determined visually.

Uses & applications

Used for beads, cabochons, carvings, ornaments, and collectors’ specimens.

Geological facts

Jasper is valued for its varied patterns; the name covers opaque, patterned chalcedony rather than one uniquely defined deposit or color.

Field identification & locations

Look for opacity, fine-grained texture, and hardness sufficient to scratch glass; these traits help distinguish jasper from softer lookalikes. Similar material occurs worldwide, including in India, Australia, Brazil, and the United States.