Polished Marble Bar Chert MB115 sskin 140 mm x 100 mm

140 mm x 100 mm x 50 mm thick

Dimensions at widest points approximately 190 mm  x 120 mm x 15 mm thick

DO198  Dendritic Opal slab polished on one side

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

Polished Marble Bar Chert MB115 sskin 140 mm x 100 mmMB115 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