sedimentary

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and clay impurities

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Tan, brown, and red with landscape-like patterns; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None

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

Identified May 23, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Tan, brown, and red with landscape-like patterns; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None

Formation & geological history

Formed as a sedimentary stone where silica-rich fluids filled cavities in volcanic ash or sedimentary rocks, often during the Miocene epoch. The distinctive patterns are created by hydrothermal circulation of iron-rich fluids.

Uses & applications

Primarily used in jewelry making (cabochons, pendants), lapidary art, and as ornamental display pieces.

Geological facts

Picture jasper is famous for its 'hidden images' that often resemble desert landscapes, mountains, or tree branches. The most famous varieties come from the Owyhee Mountains in Oregon.

Field identification & locations

Identify in the field by its opaque, porcelain-like texture, lack of cleavage, and intricate, dendritic or banded patterns. It is commonly found in the Pacific Northwest of the USA.