Polished Tiger Iron slab TI356 pilbara agate Dimensions at widest points approximately

Dimensions at widest points approximately 155 mm x 130 mm x 30 mm thick

90 mm x 75 mm x 9 mm thick

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

Dimensions at widest points approximately 55 mm  x 50 mm wide x 5 mm thick

Dimensions approximately 140 mm x 85 mm x 7 mm thick

Polished Tiger Iron slab TI356 pilbara agate Dimensions at widest points approximatelyTI356 Tiger Iron slab, polished on one side. Dimensions at widest points approximately 350 mm x 190 mm x 9 mm thick. Weighs: 1,379 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.