sedimentary

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and mineral inclusions

Hardness: 6.5–7 (Mohs); Color: Tan, brown, grey, and black; Luster: Vitreous to waxy; Crystal structure: Microcrystalline/Cryptocrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.58–2.91

Hardness: 6
Color: Tan, brown, grey, and black
Luster: Vitreous to waxy

Identified April 21, 2026More sedimentary →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed as a sedimentary process where silica-rich fluids (often from volcanic ash petrification) permeate through sediments or fractures. The 'picture' patterns are caused by the slow oxidation of iron and other mineral impurities during the crystallization process over millions of years.

Uses & applications

Primarily used as a semi-precious gemstone for jewelry, lapidary cabochons, decorative ornaments, and by mineral collectors for its unique landscape-like patterns.

Geological facts

Picture Jasper is often called 'the Earth speaking to its children' because its patterns frequently resemble miniature landscapes, mountains, or deserts. Its unique patterns are unique to each specimen, meaning no two stones are exactly alike.

Field identification & locations

Identify in the field by its opaque, dense appearance and smooth, glass-like fracture surfaces when broken. It is commonly found in the Pacific Northwest of the USA (particularly Idaho and Oregon). Collectors should look for distinct, high-contrast 'scenes' which increase value.

Other sedimentary specimens

See all

Sandstone or Siltstone

Arenite (if sandstone)

Sedimentary

Sandstone

Arenite (primarily SiO2)

sedimentary

Chert Breccia

Brecciated Chert (Microcrystalline Silica)

sedimentary

Sandstone Grain

Clastic Sedimentary Rock Grain (SiO2 dominated)

sedimentary

Shale or Slaty Mudstone

Argillaceous sedimentary rock

sedimentary

Sandstone

Arenite

sedimentary