sedimentary

Picasso Jasper (Picasso Stone)

Metamorphosed Calcium Carbonate (Silicified Limestone)

AI-generated identification · may be incorrect

Hardness: 6.5 to 7 (Mohs scale); Color: Shades of grey, black, and tan with vein-like patterns; Luster: Vitreous to dull; Crystal structure: Microcrystalline/Trigonal; Specific Gravity: 2.58 to 2.91

Hardness: 6
Color: Shades of grey, black, and tan with vein-like patterns
Luster: Vitreous to dull

Identified July 10, 2026More sedimentary →

Explore Picasso Jasper (Picasso Stone) in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 6.5 to 7 (Mohs scale); Color: Shades of grey, black, and tan with vein-like patterns; Luster: Vitreous to dull; Crystal structure: Microcrystalline/Trigonal; Specific Gravity: 2.58 to 2.91

Formation & geological history

Formed from the recrystallization of limestone deep within the Earth's crust. Heat and pressure caused the original sedimentary rock to undergo a low-grade metamorphic process, while iron oxides created the characteristic 'abstract painting' veins.

Uses & applications

Primarily used as a decorative stone in jewelry (beads, cabochons), carving, and meditation practices (worry stones).

Geological facts

Despite being called a 'Jasper', it is geologically a metamorphosed limestone. It is named after the artist Pablo Picasso because its unique patterns resemble his abstract painting style.

Field identification & locations

Identify by its distinctive criss-crossing black lines over a grey background. It is mostly found in Utah, USA. For collectors, look for high-contrast patterns and a smooth, waxy polish.