sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions

Hardness: 6.5-7.0 (Mohs scale); Color: Mustard yellow to earthy gold; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None (Conchoidal fracture); Specific gravity: 2.58-2.91

Hardness: 6
Color: Mustard yellow to earthy gold
Luster: Vitreous to dull

Identified July 15, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed via the deposition of silica from hydrothermal solutions or within volcanic ash and sedimentary deposits. The yellow coloration is caused by the presence of iron oxide (goethite) during its formation.

Uses & applications

Primarily used in jewelry for cabochons, beads, and carvings. Also used as a decorative stone in mosaics and as a healing stone in metaphysical practices.

Geological facts

Yellow Jasper is a variety of chalcedony. It has been used since ancient times as a protective talisman and was frequently mentioned in historical lapidaries as a stone of endurance.

Field identification & locations

Identify in the field by its hardness (will scratch glass), opaque nature, and dull waxy texture when unpolished. Frequently found in riverbeds or arid regions in India, Australia, and the USA.

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