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

Dimensions at widest points approximately 160 mm x 140 mm x 14 mm thick

KO112  Killaloe Opal slab

GREEN83  Green Opal & Magnesite rough rock

Fossil stromatolite rough rock

Dimensions approximately 180 mm x 85 mm x 9 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