sedimentary

Picture Jasper

Silicon Dioxide (SiO2) with impurities

Hardness: 6.5-7 (Mohs scale); Color: Tans, browns, and blacks; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.91

Hardness: 6
Color: Tans, browns, and blacks
Luster: Vitreous to dull

Identified April 28, 2026More sedimentary →

Explore Picture 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 silica-rich petrified mud or volcanic ash deposited in layers. Over millions of years, flow patterns of mineral-rich water create the 'landscape' patterns during the silicate hardening process. Most deposits date back to the Miocine epoch.

Uses & applications

Used primarily in lapidary arts for cabochons, beads, jewelry, and ornamental carvings. It is also a popular collector's stone for its aesthetic patterns.

Geological facts

Picture Jasper is often called 'landscaped jasper' because its unique color banding and flow patterns can look like desert landscapes or mountain ranges. It is essentially a fossilized mudstone.

Field identification & locations

Identify in the field by its high hardness (won't scratch with a steel knife), smooth waxy feel when wet, and characteristic tan/brown swirls. Commonly found in the Pacific Northwest region of the United States, particularly Oregon (Biggs Jasper).

Other sedimentary specimens

See all

Sandstone or Siltstone

Arenite (if sandstone)

Sedimentary

Cone-in-cone structure (Limestone)

Cone-in-cone structure (Secondary Sedimentary Structure)

sedimentary

Sandstone Grain

Clastic Sedimentary Rock Grain (SiO2 dominated)

sedimentary

Chert Breccia

Brecciated Chert (Microcrystalline Silica)

sedimentary

Shale or Slaty Mudstone

Argillaceous sedimentary rock

sedimentary

Sandstone

Arenite (primarily SiO2)

sedimentary