A stretch bracelet in 8 mm mookaite beads, in the reds, creams and mustards the stone is known for.
Mookaite is made of fossils. Not visible ones: the rock is built from the silica skeletons of radiolaria, single-celled marine organisms that settled in their billions on the floor of a shallow sea. When the sea retreated, silica cemented the sediment into solid rock. Every bead here is compacted plankton skeleton, coloured afterwards by iron oxide in the groundwater.
It comes from one place on Earth. Mooka Creek, on the western edge of the Kennedy Ranges in Western Australia, is the only known source, worked by a handful of specimen miners since the 1960s.
Rock: Mookaite, a radiolarite, cryptocrystalline silica with radiolarian microfossil structure
Composition: Silica, with hematite and goethite granules giving the colour
Type: Sedimentary (radiolarite, grading to chert and porcellanite)
Origin: Mooka Creek, Carnarvon Shire, Western Australia (only known source)
Hardness: 6.5 to 7 on the Mohs scale; hard enough for daily wear
Treatment: None
Approx. inner circumference: 7 cm unstretched
Bead diameter: 8 mm
Approx. weight: 15 g
Stringing: Elastic, stretch fit
Photographed as an example. These are strung in batches from the same material, so yours will be closely similar in colour and pattern but not the exact bracelet pictured.