sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron Oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale; Color: Mustard yellow to ochre; Luster: Dull to waxy; Crystal Structure: Microcrystalline/Trigonal; Cleavage: None (Conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Mustard yellow to ochre
Luster: Dull to waxy

Identified June 8, 2026More sedimentary →

Explore Yellow Jasper in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Mustard yellow to ochre; Luster: Dull to waxy; Crystal Structure: Microcrystalline/Trigonal; Cleavage: None (Conchoidal fracture); Specific Gravity: 2.58-2.91

Formation & geological history

Formed from fine-grained silica-rich sediments or volcanic ash that undergoes silicification over millions of years. Its yellow color is derived from iron impurities, typically goethite or limonite, present during the consolidation process.

Uses & applications

Primarily used as a semi-precious gemstone in jewelry, for decorative items, and as a popular palm stone for collectors and metaphysical practitioners.

Geological facts

Yellow Jasper was traditionally used in ancient civilizations like Egypt and among Native American tribes as a protective stone. It is a dense, opaque variety of chalcedony.

Field identification & locations

Identify in the field by its opacity (it will not let light through even at the edges, unlike agate), its smooth river-worn texture, and its ability to scratch glass. Commonly found in riverbeds and desert environments globally, notably in the USA, India, and Madagascar.