sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7.0 (Mohs); Color: Mustard yellow to golden brown with black dendrites or veins; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal) microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Mustard yellow to golden brown with black dendrites or veins
Luster: Vitreous to waxy

Identified June 28, 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

Formation & geological history

Formed through the infiltration of silica-rich fluids into volcanic ash or sedimentary beds, often during the late stages of hydrothermal activity. Its yellow color is derived from iron (goethite or limonite) content.

Uses & applications

Used primarily in lapidary work for cabochons, beads, and decorative carvings. It is popular in the metaphysical community as a stone for protection and social clarity.

Geological facts

Yellow jasper is a microcrystalline variety of quartz. Throughout history, it has been used as a 'rain stone' and a talisman for travelers. It is often found in massive form rather than distinct crystals.

Field identification & locations

Identify in the field by its opaque nature, lack of cleavage, and ability to scratch glass. It is commonly found in areas of volcanic activity or ancient seabed deposits; notable locations include South Africa, India, and the USA (Oregon and Idaho).