Polished De Grussa copper ore slab CO114 outback jasper Sometimes it exhibits striking contrasting

Sometimes it exhibits striking contrasting veins of magnesite

Dimensions at widest points approximately 160 mm x 65 mm x 30 mm thick

The environment they grew in was most probably a sandy tidal flat or braided river channel

Dimensions at widest points approximately 200 mm x 85 mm x 7 mm thick

Very unusual piece of Chrysoprase grading to a central core of whitish Chalcedony

Polished De Grussa copper ore slab CO114 outback jasper Sometimes it exhibits striking contrastingCO114 DeGrussa copper ore slab, polished on one side. Dimensions at widest points approximately 300 mm x 160 mm x 14 mm thick. Weighs: 1,205 grams A mix of copper minerals that formed in the upper oxidised zone. Consisting of dark green malachite, bright blue chrysocolla, native copper, tenorite, minor cuprite and brown iron oxides. All running through brecciated white quartz ! The Degrussa underground mine is a high grade copper deposit in Western