Polished Tiger Iron TI393 dup-review-publication PC131 Chalcedony rough rock

PC131  Chalcedony rough rock

Dimensions at widest points approximately 130 mm  x 125 mm wide x 8 mm thick

Dimensions approximately 120 mm x 70 mm x 8 mm thick

155 mm x 100 mm  x 29 mm

180 mm x 65 mm  x 7

Polished Tiger Iron TI393 dup-review-publication PC131 Chalcedony rough rockTI393 Tiger Iron rough rock, cut and polished on one side with a rough natural back and a cut base to sit as a display specimen. Dimensions at widest points approximately 90 mm x 80 mm x 25 mm thick. Weighs: 412 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,