Polished Tiger Iron slab TI391 #teredo Studies have shown that these

Studies have shown that these are probably the oldest agates in the world with an age in excess of 2 billion years

Weight is 705 grams

Large crystal lined cavity

Dimensions at widest points approximately 95 mm  x 70 mm x 7 mm thick

AZ138 Azurite sun mineral specimen

Polished Tiger Iron slab TI391 #teredo Studies have shown that theseTI391 Tiger Iron slab, polished on one side. Dimensions at widest points approximately 140 mm x 75 mm x 6. 5 mm thick. Weighs: 178 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.