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3cm x 1cm - 11
From Pakistan
and Amethyst and Malachite imbedded into metal
The nodules are mainly composed of iron and manganese oxide
MANGANESE NODULE (POLYMETALLIC), Pacific Ocean XMN035 Round 3cm x 1cm - 11Manganese Nodule (Polymetallic) Clarion Clipperton Fracture Zone Pacific Ocean Total Weight: 1. 44 grams Approximate dimensions: 14mm x 11mm x 11mm Comes in a membrane display box. Manganese nodules are found on the deep ocean floor. The nodules are mainly composed of iron and manganese oxide, but may also contain nickel, copper and cobalt. It is estimated that the nodules grow at an extremely slow rate of only a few millimetres per million years.