Polished Tiger Iron TI315 Citron chrysoprase The green colouration is caused

The green colouration is caused by traces of nickel and/or chromium

120 mm x 85 mm x 50 mm thick

Dimensions at widest points approximately 200 mm x 110 mm x 9 mm thick

CH421  Chrysoprase  slab polished  on one side

180 mm x 135 mm  x 25 mm

Polished Tiger Iron TI315 Citron chrysoprase The green colouration is causedTI315 Tiger Iron , Tiger Iron rough rock, cut and polished on one side with a natural rough back. Sits nicely as a display specimen ! Dimensions at widest points approximately 210 mm x 150 mm x 90 mm thick. Weighs: 4,362 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