Mookaite is Western Australia’s radiolarite in outback colors — mustard, plum, cream and oxblood flowing in painterly bands. Formed from silicified microfossil beds along Mooka Creek, it polishes beautifully at around 6.5–7 hardness.Each mookaite at GEMIC Institute is natural, certified by our laboratory and photographed as the exact stone on offer. Unique patterns; worldwide tracked delivery, 30-day inspection period.