Picture Jasper

Physical Properties

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

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.

Identified on: 4/21/2026

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