sedimentary

Jasper (Picture Jasper variety)

Silicon Dioxide (SiO2) with impurities

Hardness: 6.5-7 (Mohs scale); Color: Tan, brown, and grey with landscape-like patterns; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.91

Hardness: 6
Color: Tan, brown, and grey with landscape-like patterns
Luster: Vitreous to waxy

Identified March 9, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the infiltration of silica into volcanic ash or fine-grained sediment. Over millions of years (often dating to the Cenozoic era), mineral-rich waters create the distinct banding and patterns as they petrify the host material.

Uses & applications

Primarily used in jewelry making for pendants and beads, lapidary arts (cabochons), and as a popular decorative or metaphysical gemstone.

Geological facts

Picture Jasper is often referred to as 'stone of the landscape' because the dark dendritic mineral patterns can look like mountains, hills, or deserts. A famous source is the Biggs Jasper from Oregon, USA.

Field identification & locations

Identify in the field by its high harness (cannot be scratched by a steel knife) and its opaque, flow-like patterns. Common locations include the Pacific Northwest (USA), Madagascar, and Brazil. Collectors should look for unique 'scenes' within the stone.

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