The Blue Diamond Stakes is a Melbourne Racing Club Group 1 Thoroughbred horse race for two-year-olds, at set weights, run over 1200 metres at Caulfield Racecourse in Melbourne, Victoria, Australia.
[1] The event is Victoria's richest two-year-old race with total prize money of A$2,000,000.
In 1996 the event was held at Flemington Racecourse due to reconstruction of Caulfield Racecourse.
In 2023 the race was run at Sandown Racecourse.
† Roedean finished first but was later disqualified for returning a positive swab