Polished Marble Bar Chert MB104 black jasper conglomerate CO113 DeGrussa copper ore slab

CO113  DeGrussa copper ore slab

140 mm x 85 mm  x 9

From the same outcrop as Pseudogymnosolenid type which occur as a substrate beneath these ones

CLA237   Australian Crazy Lace Agate slab

PG131  Pegmatite slab

Polished Marble Bar Chert MB104 black jasper conglomerate CO113 DeGrussa copper ore slabMB104 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 70 mm x 40 mm thick. Weighs 850 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