Polished Marble Bar Chert MB118 Citron chrysoprase Dimensions at widest points approximately

Dimensions at widest points approximately 160 mm x 120 mm x 45 mm thick

85 mm x 45 mm x 25 mm thick

Fossil stromatolite rough rock

BM303  Brecciated  Mookaite slab

Dimensions at widest points approximately 115 mm x 110 mm  x 60 mm thick

Polished Marble Bar Chert MB118 Citron chrysoprase Dimensions at widest points approximatelyMB118 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 120 mm x 60 mm thick. Weighs 2,000 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