Purple Chalcedony polished slab. PU147 Polished dendritic opal Dimensions at widest points approximately

Dimensions at widest points approximately 140 mm x 95 mm x 70 mm thick

Coarse and fine gold is seemingly related to higher concentrations of pyrite within a 200 metre sequence of poorly-stratified

Sections consist of a chaotic mixture of dolomite and/or stromatolite fragments set in a matrix of mudstone and/or coarsely crystalline dolomite

MN123  Magneprase rough rock

Purple Chalcedony polished slab. PU147 Polished dendritic opal Dimensions at widest points approximatelyPU147 Purple Chalcedony slab, polished on one side. Dimensions at widest points approx. 145 mm x 120 mm x 10 mm thick. Weighs 404 grams. From the Eastern Goldfields region of Western Australia.