sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Mustard yellow, tan, or ochre; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Mustard yellow, tan, or ochre
Luster: Vitreous to waxy

Identified March 29, 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 (Mohs); Color: Mustard yellow, tan, or ochre; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91

Formation & geological history

Formed through the accumulation of silica-rich fluids in volcanic ash or sedimentary beds. The yellow coloring is primarily due to the presence of goethite or other iron oxides during the silicification process.

Uses & applications

Used primarily as decorative lapidary material, cabochons for jewelry, and in metaphysical practices as a 'grounding' stone. Often used for tumbled stones or carved ornaments.

Geological facts

Jasper is an opaque variety of chalcedony. Historically, it was used by ancient civilizations for bow drills and cylinder seals. Yellow Jasper is specifically associated with solar plexus chakra themes in folklore.

Field identification & locations

Identify by its waxy texture, opacity (does not let light through), and conchoidal fracture (smooth, curved breaks). Found globally in riverbeds or coastal areas where erosion has exposed silica deposits.