sedimentary

Picture Jasper

Impure variety of silica (SiO2)

Hardness: 6.5 - 7 on Mohs scale; Color: Tan, brown, and cream with landscape-like patterns; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58 - 2.91

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

Identified June 18, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed primarily as a sedimentary rock where silica-rich fluids (often from volcanic ash) petrify mud and sand. The unique patterns are caused by flow and pressure during formation, often over millions of years. This specific variety is frequently associated with the Miocene epoch.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons, beads, pendants) and ornamental carvings due to its aesthetic appeal. It is highly valued as a collector's stone for its natural 'landscape' imagery.

Geological facts

Picture Jasper is often referred to as 'Earth's Mother' because its patterns can look like snapshots of the landscapes from which it was taken. One of the most famous varieties is Biggs Jasper, discovered near Biggs Junction, Oregon.

Field identification & locations

Identify in the field by its opaque appearance, high hardness (it will scratch glass), and its distinctive, non-repeating banded or 'sandy' appearance. Commonly found in desert regions of Idaho and Oregon, USA.