setting, when it will appear nearly white, the blue material correcting the yellow hue of the gem.
For the localities where diamonds have been or are found reference may be made to the works named in the brief bibliography in the present manual. The story of the diamond-fields of the world is full of romantic interest. India, Brazil, Borneo, and South Africa have all furnished most curious contributions to the long list of adventures, discoveries, and disasters connected with the diamond.
Until January 25th. 1905, when the Cullinan diamond weighing 3,032 carats, or 621½ grams, was found in the Premier mine 20 miles W.N.W. of Pretoria, the largest known diamond was that from the Jagersfontein mine, Orange River Colony, discovered on June 30th, 1893. It weighed 971¾ carats, but owing to an imperfection the largest brilliant cut from it weighed only 239 carats. It has been called the "Jubilee" and the "Excelsior," and is of high quality. The largest diamond found at Kimberley was an octahedron of 503 carats, but this stone was full of black spots. Amongst the diamonds obtained from the river Vaal diggings the largest is a rounded pebble weighing 330¼ carats, but it is not of good quality.
It has been estimated that the value of the diamonds added to the world's stock from the South African mines is more than £85,000,000. Even in one year (1903) the value of diamonds exported from Cape Colony was close upon £5,500,000. By the side of these figures the yields in ancient days of India, and, since the year 1725, of Brazil, do not seem large. At the present time diamonds are still found in Brazil, while new sources have been discovered in New South Wales, Borneo, and British Guiana. From the last named colony 173,744 stones were exported in 1902, but they were very small, for they weighed altogether no more than 11,518 carats.
The winning of diamonds and their mode of occurrence in the