sedimentary

Mookaite Jasper

Silicified Porcellanite (SiO2 with impurities)

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale. Color: Combinations of red, burgundy, mustard yellow, and cream. Luster: Vitreous to dull. structure: Microcrystalline/Cryptocrystalline. Cleavage: None (conchoidal fracture).

Hardness: 6
Color: Combinations of red, burgundy, mustard yellow, and cream
Luster: Vitreous to dull

Identified April 30, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from the skeletal remains of radiolaria (microscopic marine organisms) deposited in shallow sea beds during the Cretaceous period (about 66-145 million years ago), which then underwent silicification.

Uses & applications

Primarily used in jewelry as cabochons, beads, and carvings. Also highly valued by collectors and used as a decorative stone in lapidary arts.

Geological facts

Mookaite is named after Mooka Creek in Western Australia, which is the only place in the world where this specific variety is found. The name 'Mooka' means 'running waters' in the local Aboriginal language.

Field identification & locations

Identify by its distinct earthy color palette (red, yellow, tan) and its smooth, porcelain-like texture when polished. In the wild, it is found as weathered boulders near the Kennedy Ranges of Western Australia.