Polished De Grussa copper ore CO105 atlantisite 70 mm x 75 mm

70 mm x 75 mm x 30 mm thick

All reasonably uniform in size (roughly 20 - 25 mm diameter)

Dimensions at widest point approximately 140 mm x 75 mm x 40 mm

Totally replaced by colourful chert

PC112 Chalcedony slab

Polished De Grussa copper ore CO105 atlantisite 70 mm x 75 mmCO105 DeGrussa copper ore , cut and polished on one side with a natural rough back . Dimensions at widest points approximately 140 mm x 75 mm x 60 mm thick. Weighs: 1,638 grams A mix of copper minerals that formed in the upper oxidised zone. The Degrussa underground mine is a high grade copper deposit in Western Australia that commenced operation in 2012 and ceased mining in 2022.