Pollucite. POR102 Green Opal BJ134 Polished "Black Jade" A

BJ134  Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt)

POT137  Tumble polished Pink Opal from Mooka Creek

Dimensions approximately 140 mm x 60 mm x 8

Weighs 988 grams

Pollucite. POR102 Green Opal BJ134 Polished "Black Jade" APOR102. Pollucite rough rock.. Extremely rare mineral specimen or suitable for cutting. Dimensions at widest points approx. 60 mm x 60 mm x 60 mm thick. Weighs 415 grams. From near Norseman, Western Australia. Pollucite only occurs in extremely differentiated lithium caesium tantalum (LCT) pegmatites. Economic caesium deposits are extremely rare, with only two mining operations worldwide having produced commercial quantities of pollucite. In 2018 a