Okavango Diamond Company reveals 'The Okavango Blue' | Mining News
Blue diamond with 29.6 carats unearthed by Petra at South African mine
Rare, uncut blue diamond found in South Africa
Mining company in South Africa finds rare blue diamond - BBC News
Petra Diamonds | Cullinan Mine - Petra Diamonds
Cullinan Diamond Mine, Gauteng, South Africa
Petra finds 39-carat blue diamond at Cullinan mine - MINING.COM
Rare blue diamond found in South Africa
Almost Flawless": Okavango Blue Diamond And Botswana Mining Exhibit Comes To The AMNH - Gothamist
Blue Diamond Gemstone Panning
Crews begin filling Blue Diamond mines - YouTube
Blue diamond - Wikipedia
A tour of Cullinan Diamond Mine, a gem in the Petra portfolio - African Mining Online
Petra Diamonds | Cullinan Mine - Petra Diamonds
Blue diamond found by struggling Petra sold for $14.9 million - MINING.COM
Blue Diamond Mine - Wikiwand
Premier Mine - Wikipedia
FT-IR Helps Uncover the Secrets of the Blue Moon
Blue Diamonds: Colored by boron at extreme depths
Petra to hold special tender to sell five blue diamonds
Botswana unveils rare 20-carat blue diamond, the country's largest ever - MINING.COM
Petra finds 20.08-carat blue diamond at flagship Cullinan mine - MINING.COM
mining on Twitter: "This rare #bluediamond known as the “Bulgari Laguna Blu” could fetch $28 million at @Sothebys auction https://t.co/jpS9EXYvJG via @CeciliaJamasmie" / Twitter
Rare blue diamond sold for over $40 million in most expensive rough diamond sale ever
