sedimentary
Mookaite Jasper
SiO2 (Silicon Dioxide with impurities)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7, featuring distinct earthy tones of burgundy, mustard yellow, and cream with a vitreous to dull luster and microcrystalline structure.
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Physical properties
Mohs hardness of 6.5 to 7, featuring distinct earthy tones of burgundy, mustard yellow, and cream with a vitreous to dull luster and microcrystalline structure.
Formation & geological history
Formed from the weathering of radiolarian skeletons in shallow marine environments in Western Australia during the Cretaceous period.
Uses & applications
Widely utilized for ornamental carvings, polished cabochons in jewelry, and prized by mineral collectors.
Geological facts
Mookaite is found exclusively along the Kennedy Ranges near Mooka Creek in Western Australia, giving the stone its unique regional name.
Field identification & locations
Easily identified by its vibrant multicolored matrix and smooth polished appearance, commonly sourced directly from Western Australia.
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Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion
Calcareous concretion; exact fossil and host-rock composition are not identifiable from the image
fossil
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary