sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with goethite/iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: Mustard yellow to brownish-yellow, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (cryptocrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.6-2.9

Hardness: 6

Identified April 30, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed via the deposition of silica from water or volcanic ash, often in association with iron oxides that provide the yellow pigment. Typically dates from various eras from Precambrian to Cenozoic.

Uses & applications

Used primarily as a gemstone for jewelry, lapidary work (cabochons), and decorative carvings. Highly valued in spiritual/metaphysical communities.

Geological facts

Yellow Jasper was historically known as a 'nurturing stone.' The color comes from high concentrations of goethite or limonite. It is a variety of chalcedony that is opaque rather than translucent.

Field identification & locations

Identify by its smooth, waxy texture and inability to be scratched by a steel pocket knife. Found commonly in stream beds and desert regions of India, South Africa, and the USA (Oregon and Idaho).