Tiger iron 33.63 ct triangle cabochon 29.2 x 29.0 mm y31690
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.
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