TIGER IRON, a mixture of iron oxide, tiger eye and hematite. In fact is related to what is called B.I.F. ( banded iron formation) ,a very old rocks made of layer of stromatolite and iron minerals. It's one of the oldest marine rocks dated over a billion years old. From Australia.
Size: 40.3x21.5x4.1 mm.
Weight: 30.83 ct.