sedimentary

Mookaite Jasper

Silicon Dioxide (SiO2) with various mineral inclusions

Hardness: 6-7 (Mohs). Color: Opaque with swirls of burgundy, mustard yellow, and cream. Luster: Vitreous to waxy when polished. Crystal structure: Cryptocrystalline (hexagonal/trigonal). Cleavage: None, conchoidal fracture.

Hardness: 6-7 (Mohs)
Color: Opaque with swirls of burgundy, mustard yellow, and cream
Luster: Vitreous to waxy when polished

Identified July 3, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from the silicified remains of radiolaria (microscopic marine organisms) deposited in shallow seabed environments during the Cretaceous period (approx. 66-145 million years ago).

Uses & applications

Predominantly used as a semi-precious gemstone for jewelry, cabochons, decorative carvings, and as a popular palm stone for collectors and metaphysical practitioners.

Geological facts

Mookaite is unique to Australia, found specifically in the Mooka Creek area of Western Australia. The name 'Mooka' is an Aboriginal word meaning 'running waters'. It is technically a silicified porcellanite.

Field identification & locations

Identify by its distinct earth-tone color palette and opaque, shiny finish. Found in stream beds and weathered outcrops in the Windalia Radiolarite formation. Collectors should look for vibrant, contrasting color banding.

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