Polished Marble Bar Chert MB109 beryl Lepidolite rough rock

Lepidolite rough rock

Dimensions at widest points approximately 140 mm  x 75 mm x 8

Dimensions at widest points approximately 60 mm x 50 mm x 38 mm thick

From the Jeerinah Formation in the Hamersley Ranges

Weighs 631 grams

Polished Marble Bar Chert MB109 beryl Lepidolite rough rockMB109 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