Polished Marble Bar Chert MB105 cla PU139 Purple Chalcedony rough rock

PU139  Purple Chalcedony rough rock

Tumble polished Variscite

DO188  Wanong Dendritic Opal slab

Dimensions at widest points approximately 140 mm x 95 mm x 75 mm thick

Polished Marble Bar Chert MB105 cla PU139 Purple Chalcedony rough rockMB105 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 50 mm thick. Weighs 1,109 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