Polished Tiger Iron slab TI368 black jasper Dimensions at widest points approximately

Dimensions at widest points approximately 140 mm x 110 mm x 8 mm thick

Approximate weight of each piece is between 53 and 125 grams

From near Coolgardie in the Eastern Goldfields region of Western Australia

GRN102  Green Opal & Magnesite rough rock

Polished Tiger Iron slab TI368 black jasper Dimensions at widest points approximatelyTI368 Tiger Iron slab, polished on one side. Dimensions at widest points approximately 290 mm x 170 mm x 9 mm thick. Weighs: 1,182 grams From the Cleaverville Formation, Ord Ranges near Port Hedland, Western Australia. Age is over 3 billion years. Tiger iron is a banded iron formation (BIF) or jaspilite that has alternating layers of black and brown hematite magnetite, red jasper and chatoyant golden tiger eye.