All of these colorful natural rough diamonds are one-in-a-million

Rough Diamonds: A Blue, Pink and Violet July - IGI

$15 Million for 32.33ct Rough Pink Diamond found by Petra

Colored Diamonds: When imperfections create beauty

The World's Rarest Diamonds - Brilliant Earth

Know About Very Rare And Valuable Natural Green Diamonds - RRP Diamonds

32.32-carat rare pink diamond fetches $19 million - Jeweller Magazine: Jewellery News and Trends

Fascinating Facets: The Pink Starburst Diamond

Diacore Buys 32-Carat Rough Pink Diamond for Nearly $14M

How To Identify A Black Diamond - Astteria

The Great Diamond Hoax of 1872, History

The Foxfire Diamond Bedazzles as Smithsonian's Newest Rock Star, At the Smithsonian

What is a gem? And why painite from Myanmar can fetch US$60,000 per carat

The Different Shapes of Natural Color Rough Diamond

Red Diamond - The Rarest Natural Diamond Color of Them All