magnesium is the eight most abundant element in the earth's crust but does not occur and combined in nature. it is found in large deposits in minerals such as magnesite and dolomite. the sea contains trillion of tonnes of magnesium and this is the source of much of the 850, 000 tonnes now produced each year
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magnesium is the eight most abundant element in the earth's crust but does not occur and combined in nature. it is found in large deposits in minerals such as magnesite and dolomite. the sea contains trillion of tonnes of magnesium and this is the source of much of the 850, 000 tonnes now produced each year