Polished Tiger Iron slab TI372 stripey All reasonably uniform in size

All reasonably uniform in size (roughly 20 - 30 mm diameter}

170 mm x 70 mm  x 15

140 mm x 90 mm x 8 mm thick

Weighs 869 grams

POT138  Tumble polished Pink Opal from Mooka Creek

Polished Tiger Iron slab TI372 stripey All reasonably uniform in sizeTI372 Tiger Iron slab, polished on one side. Dimensions at widest points approximately 105 mm x 90 mm x 10. 5 mm thick. Weighs: 285 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.