sedimentary

Jasper (specifically Owyhee or Picture Jasper variety)

Jasper (Silicon Dioxide, SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Tan, brown, and cream with scenic patterns; Luster: Vitreous to dull; Crystal structure: Microcrystalline/Cryptocrystalline (Trigonal); Cleavage: None; Specific gravity: 2.58-2.91

Hardness: 6
Color: Tan, brown, and cream with scenic patterns
Luster: Vitreous to dull

Identified March 8, 2026More sedimentary →

Explore Jasper (specifically Owyhee or Picture Jasper variety) 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 volcanic ash or fine-grained silica-rich sediments that have been petrified and silicified through hydrothermal processes or mineral-rich groundwater over millions of years.

Uses & applications

Primarily used for lapidary arts including cabochons for jewelry, ornamental carvings, and high-end decorative tiles or paperweights due to its unique 'landscape' patterns.

Geological facts

Jasper is an opaque variety of chalcedony. The 'picture' naming refers to the dendritic or sediment-layer patterns that often resemble mountains, trees, or horizons when cut into slabs.

Field identification & locations

Identify in the field by its waxy to earthy texture, opacity (light will not pass through even thin edges), and distinctive banding or scenic patterns. Common in the Owyhee region of Oregon/Idaho, USA.