Polished Tiger Iron TI307 pilbara agate The interesting cylindrical cavity is

The interesting cylindrical cavity is all that remain of a fossil belemnite which was a squid-like creature with a tapering torpedo or bullet shaped body

KA140   Kumarina Agate

SD155 Stromatolitic Dolomite rough rock

290 mm x 120-170mm x 18mm thick

Large reserves of this stone occur in Western Australia

Polished Tiger Iron TI307 pilbara agate The interesting cylindrical cavity isTI307 Tiger Iron rough rock, cut and polished on one side with a natural rough back. Incredible folds in this piece ! Dimensions at widest points approximately 190 mm x 100 mm wide x 50 mm thick. Weighs: 1,807 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