mineral

Yellow jasper (likely polished/tumbled)

Microcrystalline quartz, SiO₂, colored by iron oxides; identification is visual and not definitive.

AI-generated identification · may be incorrect

Opaque yellow to ochre, with a waxy-to-dull luster and no visible cleavage; quartz hardness is about 7 Mohs, and specific gravity about 2.6. The rounded shape and smooth surface suggest tumbling or polishing.

Identified October 13, 2026More mineral →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids deposit and cement microscopic quartz, often incorporating iron oxides that create yellow coloration. It occurs in varied geological settings and ages; the image cannot establish a precise source or age.

Uses & applications

Used for beads, cabochons, ornaments, and small decorative objects; jasper is also collected as a lapidary material.

Geological facts

Jasper is an opaque variety of chalcedony, unlike transparent quartz crystals; its colors and patterns vary with mineral impurities.

Field identification & locations

Look for an opaque, compact stone with a smooth conchoidal fracture or polish and no obvious grains. Yellow jasper is found worldwide, including India, Madagascar, Brazil, and the United States; confirmatory testing may distinguish it from other yellow stones.