Polished Marble Bar Chert MB115 sskin DO198 Dendritic Opal slab polished

DO198  Dendritic Opal slab polished on one side

Weighs 255 grams

It weighs 117 grams

Approximate dimensions at widest points 160 mm  x 140 mm  x 90 mm thick

110 mm x 70 mm x 35 mm thick

Polished Marble Bar Chert MB115 sskin DO198 Dendritic Opal slab polishedMB115 Marble Bar Chert. Cut and polished on one side with a rough, natural back. Dimensions at widest points approximately 150 mm x 110 mm x 50 mm thick. Weighs 1,151 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