‘Golconda’ refers to a region in India which was the first significant source of diamonds in the world. This area was also the first source of rare type IIa diamonds. This group of diamonds are the most chemically pure and display a fine whiteness and superior clarity. Golconda diamonds are still revered to be the finest quality diamonds in the world and this description implies a particularly rare quality. For centuries India was virtually the sole source of the world’s diamonds until the discovery of diamonds in Brazil in the early 18th century and then South Africa in the late 18th century.