10 Facts You Should Know About Blue Diamonds

  • Blue diamonds are considered extremely rare and mysterious. They range from the light blue sky of a winters day to the deep blue of the ocean.

  • The movie Titanic features a fictional Fancy Deep Blue Diamond called "Heart of the Ocean." But the depiction of the diamond in the movie is unrealistic; it looks much more like a sapphire.

  • The striking blue colour often comes from boron trapped in the crystal’s structure.

  • Due to the presence of boron, only natural blue diamonds conduct electricity. 

  • Blue diamonds are rare, with only about one in 200,000 diamonds showing a bit of blue, and far fewer displaying rich colour.

  • The Cullinan mine and Golconda region are the most notable areas where blue diamonds have come from. 

  • In 2008 The Wittelsbach Diamond, a 35.56 carat cushion-shaped fancy deep blue, was purchased at auction for $24 million. 

  • The most famous blue diamond in history is the 45 carat Hope Diamond, which is rumored to be cursed. One of its owners Evalyn McLean believed it to be her good luck charm, but after possession of the gem she became a morphine addict, her young son died, her husband divorced her, and her daughter committed suicide.

  • Irradiated "blue diamonds" are genuine diamonds that have been treated with intense radiation. Irradiated diamonds are poor substitutes for their natural blue cousins, due to their electric-blue-green colour.

  • Blue Diamonds rate 10.0 on the mohs hardness scale, making them exceptionally well-suited for use in jewellery. 


August 12, 2014 by Perrine Comeille
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