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Porphyry is a general term that is used rather loosely for igneous rocks which contain relatively large isolated crystals set in a fine-grained groundmass
It weighs 134 grams
Weighs 144 grams
Small crystal lined cavities
Dimensions at widest points approximately 170 mm x 125 mm x 15 mm thick
Polished De Grussa copper ore slab CO135 mookatite Porphyry is a general termCO135 DeGrussa copper ore slab, polished on one side. A mix of copper minerals that formed in the upper oxidised zone. This piece is mostly native copper ! Dimensions at widest points approximately 90 mm x 70 mm x 11. 5 mm thick. Weighs: 240 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.
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