How Diamonds Get Their Color, Sotheby's Diamonds

Not all valuable diamonds are colorless or white. In fact, a variety of minerals, from nitrogen to boron, can affect a gem’s hue – as well as its value.

The Williamson Pink Star-One of the Purest, Pinkest Diamonds Ever to Appear at Auction To be offered at Sotheby's this Autumn, Press Release

Russian royal gems, rare coloured diamonds on Geneva auction block - Sotheby's

How Diamonds Get Their Color, Sotheby's Diamonds

Read before you buy: the ultimate guide to fancy colour diamonds - Jeweller Magazine: Jewellery News and Trends

A 3.05 Carat Emerald-Cut Diamond, K Color, VS1 Clarity, Diamonds Online, Capsule Collection, Jewellery

Sotheby's to Auction World's Most Vivid Pink Diamond Estimated at $35M

Ultra-rare' pink diamond sells for $34.8 million at auction

Legends of New York - Jewelry Connoisseur

Sotheby's to Auction Rare Blue Diamond - The New York Times

15 Colored Diamonds in Blue, Pink, Yellow, Green & All Shades in Between, Jewelry