Manganese is a trace mineral that is found in avocados, nuts, seeds, leafy green vegetables and seaweed… and fruits such as pineapple, blueberries and oranges. It can also come from herbs such as peppermint, chamomile and parsley.
Manganese may occur naturally in rocks. Pyrolusite (MnO2) and Rhodochriste (MnCO3) are common forms, plus large nodules of 24% manganese have been found on the ocean floor (which explains why it is found in some seaweed).
The largest reserves of manganese minerals on land are in South Africa and Ukraine, which contain more than half the world’s established manganese reserves. But China is the world leader in mine production of manganese, with about 25% of the total; Australia is the #2 producer. The US has no domestic manganese mining and imports all it uses (almost 400,000 tons in 2009) from Gabon, South Africa, China, Australia, and elsewhere.
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