Polished De Grussa copper ore slab CO129 polished prehnite Very unusual piece

Very unusual piece

Dimensions at widest point approximately 155 mm x 95 mm x 10 mm

Dimensions at widest points approximately 150 mm x 30 mm x 7

HEM134  Hematite geode half

Polished De Grussa copper ore slab CO129 polished prehnite Very unusual pieceCO129 DeGrussa copper ore slab, polished on one side. Dimensions at widest points approximately 250 mm x 230 mm x 14 mm thick. Weighs: 1,779 grams A mix of copper minerals that formed in the upper oxidised zone. Consisting of dark green malachite, tenorite, cuprite, chrysocolla, native copper and brown iron oxides. The Degrussa underground mine is a high grade copper deposit in Western Australia that commenced operation in 2012 and ceased mining in