What are Blue Diamonds? FAQ
Natural-Color Blue, Gray, and Violet Diamonds: Allure of the Deep
Rare 20-carat blue diamond unveiled in Botswana - ABC News
Blue Diamond vs. Sapphire
Rare 25.5-Carat Blue Diamond Is the Latest Treasure to Be
Hope diamond Blue Diamond, 45.52 Carats, Smithsonian Institution
World's Largest Uncut Diamond up for Auction in London - ABC News
Rare blue diamond found in South Africa
Five Rare Blue Diamonds Discovered at Cullinan Mine - Geology In
Another rare blue diamond found at Cullinan mine [photos]
The World's Rarest Diamonds - Brilliant Earth
Rare 20-carat blue diamond unveiled in Botswana - ABC News