Polished Marble Bar Chert MB109 oldest agate in the world 300 mm x 120 mm

300 mm x 120 mm  x 11 mm

60 mm x 60 mm x 26 mm thick

XL114 Quartz crystal from the southern Pilbara

Weighs 436 grams

Tumble polished Chrysoprase

Polished Marble Bar Chert MB109 oldest agate in the world 300 mm x 120 mmMB109 Marble Bar Chert. Cut and polished on one side with a rough, natural back. Dimensions at widest points approximately 140 mm x 60 mm x 45 mm thick. Weighs 718 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 of the Earths oldest well preserved sedimentary