Blue and Green diamonds are considered extremely rare. They range from the colour of a light blue sky to the deep blue of the ocean and light mint greens to vivid grass greens.

Blue diamonds are only found in the Cullinan mine, Pretoria, South Africa, and the Argyle mine in Australia.

Green diamonds are found in Africa and South America. These two colours are also investment diamonds and can also look magnificent in a jewellery setting with a white diamond surround, to bring out the beauty in the colour.