Polished Tiger Iron slab TI277 Green Opal A slab polished on one

A slab polished on one side

From Malbunka copper mine in Northern Territory

35 pieces  of rough Tiger Iron

Approximate weight of each piece is between 82 and 165 grams

Dimensions at widest points approximately 155 mm x 85 mm x 8 mm thick

Polished Tiger Iron slab TI277 Green Opal A slab polished on oneTI277 Tiger Iron slab, polished on one side . Dimensions at widest points approximately 155 mm x 80 mm wide x 8 mm thick. Weighs: 299 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.