Polished Marble Bar Chert MB104 Opalite Recently dug (July 2023) from

Recently dug (July 2023) from our mining lease near the Ashburton River

Dimensions at widest points are approximately 170 mm x 45 mm x 50 mm

Large museum piece

Dimensions at widest points approximately 190 mm x 130 mm x 30 mm thick

60 mm x 35 mm  x 30 mm

Polished Marble Bar Chert MB104 Opalite Recently dug (July 2023) fromMB104 Marble Bar Chert. Cut and polished on one side with a rough, natural back and a cut base to stand as a display specimen ! Dimensions at widest points approximately 140 mm x 70 mm x 40 mm thick. Weighs 850 grams. Marble Bar chert is a finely banded, iron rich silica rock from the Marble Bar Chert Member (Warrawoona Group) of Western Australia. Formed in shallow Archean seas, it dates to the Paleoarchean (~3. 46 billion years old), making it one