John Williamson (geologist)
John Thoburn Williamson (1907–1958) was a Canadian geologist famous for establishing the Williamson diamond mine in present-day Tanzania; he was the only man in the 20th century to create his own diamond mine.
John Thoburn Williamson (1907–1958) was a Canadian geologist famous for establishing the Williamson diamond mine in present-day Tanzania; he was the only man in the 20th century to create his own diamond mine.