Polished Tiger Iron slab TI293 ashburton agate Dimensions approximately 90 mm x

Dimensions approximately 90 mm x 80 mm x 75 mm thick

Approximate dimensions at widest points 110 mm  x 85 mm  x 45 mm thick

Each piece approximately 5-7 cm at widest points

BST102     Fossil stromatolite slab

Polished Tiger Iron slab TI293 ashburton agate Dimensions approximately 90 mm xTI293 Tiger Iron slab, polished on one side . Dimensions at widest points approximately 80 mm x 35 mm wide x 6. 5 mm thick. Weighs: 59 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.