However, though diamonds are found naturally, about 30% of all industrial diamonds used in the U.S.. 
Sir Richard Francis Burton Kcm FRstgs (19 March 1821 – 20 October 1890) jẹ́ ọmọ Ilẹ̀gẹ̀ẹ́sì tó jẹ́ Olùkọ̀wé, Onímọ̀-ilẹ̀ àti Onímọ̀-èdè àti diplomat.. 