Donnel Foster Hewett

Donnel Foster Hewett (June 24, 1881, Irwin, Pennsylvania – February 5, 1971) was an American geologist and mineralogist, known for his leading role in the 1905 discovery of the Minas Ragra vanadium ore deposit in Peru. This ore deposit was the world's principal source of vanadium for more than 30 years. Hewett, with Earl V. Shannon, described and named orientite, a mineral rich in manganese.

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