Diamonds are the rarest substance in the world. They are unique and quite expensive than other gemstones. They are rarely found in mines over the world. Some of the most expensive diamonds are the allnatt diamond $ 3 million, the Moussaieff red diamond $ 7 million, the Heart of eternity $16 million and the most expensive is the Cullinan which cost you around $ 400 Millions. The cost of diamond varies according to their cut, carat, color and clarity. If you wish to buy the high quality diamonds at reasonable then you can visit superlightdiamonds.com and buy the stunning one.