sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) - Impure Cryptocrystalline Quartz

AI-generated identification · may be incorrect

Hardness: 6.5 - 7 (Mohs scale), Color: Mustard yellow to brownish-yellow, Luster: Dull to waxy, Crystal Structure: Hexagonal (Microcrystalline), Cleavage: None (Conchoidal fracture), Specific Gravity: 2.58 - 2.91

Hardness: 6

Identified April 25, 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 from the deposition of silica from water solutions or volcanic ash into sedimentary environments; the yellow color is typically caused by iron oxide (goethite) inclusions. It can form in various geological ages.

Uses & applications

Used primarily as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular specimen for rock tumbling and metaphysical collections.

Geological facts

Jasper has been used as a sacred stone by various cultures for millennia. Yellow Jasper specifically is often referred to as a 'stone of endurance' in metaphysical circles and has been used in amulets since ancient times.

Field identification & locations

Identify in the field by its opacity (unlike translucent citrine), its hardness (will scratch glass), and its smooth, waxy feel when water-worn. Commonly found in riverbeds or desert regions globally.