Polished Tiger Iron slab TI277 Green Opal Approximate weight of each piece

Approximate weight of each piece is between 82 and 165 grams

grinding or polishing as the matrix holding the pisolites (small round pebbles) is in many cases quite soft

Dimensions at widest points approximately 135 mm x 50 mm x 50 mm thick

Dimensions at widest point approximately 120 mm x 120 mm x 11 mm

Polished Tiger Iron slab TI277 Green Opal Approximate weight of each pieceTI277 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.