 The original Allnatt Diamond weighed 102.07 carats (20.414 g) and was graded a Fancy Intense yellow by the GIA Gem Laboratory but after recutting to its present 101.29 carats (20.258 g), it was classified as Fancy Vivid yellow.Allnatt also enjoyed horse racing.A horse named "Ujiji" owned by Allnatt finished third in the English Derby in June 1942 and first in the Gold Cup in 1943 at Newmarket, England.