This is an annotated list of important diamond . It is in alphabetical order based on last name.
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Barney Barnato (1851–1897), British Randlord and diamond magnate
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Alfred Beit (1853–1906), Anglo-German gold and diamond magnate
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Thomas Cullinan (diamond magnate) (1862–1936), South African diamond magnate.
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David Harris (South African businessman) (1852–1942), South African soldier, diamond magnate, and legislator
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John Dale Lace (1859–1937), South African gold and diamond magnate.
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Lev Avnerovich Leviev (born 1956), Israeli diamond magnate, investor, and philanthropist
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William McHardy (diamond magnate) (1846–1913), Scottish-South African diamond magnate
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Cecil Rhodes (1853–1902), British mining magnate and politician
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Maurice Tempelsman (1929–2025), Belgian-American businessman, a diamond magnate, and merchant
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Harold Wernher (1893–1973), British military officer and diamond magnate
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Julius Wernher (1850–1912), German-born Randlord, diamond magnate, and art collector
