sedimentary

Mookaite Jasper

Silicon Dioxide (SiO2) with various inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7.0 (Mohs scale); Color: Purple, deep red, cream, and mustard yellow; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None/Conchoidal fracture; Specific gravity: 2.63-2.65

Hardness: 6
Color: Purple, deep red, cream, and mustard yellow
Luster: Vitreous to waxy

Identified June 7, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from the fossilized remains of radiolaria (microscopic protozoa) in the Mooka Creek area of Western Australia. It is a silicified Windalia Radiolarite dating back to the Lower Cretaceous period (approx. 120 million years ago).

Uses & applications

Commonly used in lapidary work for making cabochons, beads, and carvings. It is popular in the metaphysical community and as a collector's specimen due to its unique color bands.

Geological facts

Mookaite is only found in one specific location in the world: the Kennedy Ranges near Gascoyne Junction in Western Australia. The term 'Mooka' comes from an Aboriginal word meaning 'running waters'.

Field identification & locations

Identify in the field by its distinct earthy color palette (red, purple, yellow) and its smooth, opaque, porcelain-like texture when broken. It is often found as nodules or layers in weathered radiolarite beds.