sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 Mohs; Color: Mustard yellow to golden brown; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.6-2.9

Hardness: 6
Color: Mustard yellow to golden brown
Luster: Vitreous to waxy

Identified June 29, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Mustard yellow to golden brown; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.6-2.9

Formation & geological history

Formed through the deposition of silica from water-rich environments, often in volcanic or sedimentary processes where iron impurities provide the distinct yellow hue. Common in regions with high volcanic activity or ancient seabed deposits.

Uses & applications

Used primarily in lapidary arts for cabochons, beads, and decorative carvings. It is also used as an ornamental stone and is highly popular in the metaphysical community as a 'stone of protection.'

Geological facts

Jasper is an opaque variety of chalcedony. The name 'Jasper' is derived from the Greek word 'iaspis', meaning 'spotted stone.' Yellow Jasper specifically gets its color from the presence of goethite or iron oxides.

Field identification & locations

Identify in the field by its opacity (unlike translucent quartz), waxy texture when polished, and high hardness. It is commonly found in riverbeds, beaches, and desert plains, especially in areas like Brazil, Madagascar, and the USA.