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Fonseca, Alvaro da [Jacob Jessurun Alvares] (1657?–1742), diamond merchant, was born in Lisbon, the second of three children of Manuel Alvares and Brites Gomes. His full name was probably Alvaro da Fonseca Alvares. The family were New Christians from Trancoso in northern Portugal...


Oats, Francis (1848–1918), mining engineer and authority on diamonds, was born on 24 October 1848 at South Torfrey Farm, Golant, near Fowey, Cornwall, the elder child of Francis Oats (1796–1874), farmer, and his wife, Marion, née Rundle (b. 1810). About 1854 his family moved to ...


Maker: unknown photographer

Sir Ernest Oppenheimer (1880–1957) by unknown photographer De Beers Consolidated Mines, South Africa


Oppenheimer, Sir Ernest (1880–1957), diamond merchant and financier, was born in Friedberg, Germany, on 22 May 1880, the fifth son and eighth child of Eduard Oppenheimer (1841–1924), cigar merchant, and his wife, Nanny Hirschhorn (1841–1912). From the age of ten he was educated in French and classics at the ...