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

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

Chalcedony grading into silicated magnesite

EU116  Eucryptite slab

Weighs 315 grams

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

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.