Photos by Robert Weldon, arranged by Gabriela Farfan, courtesy of Ronald Winston Imagine a diamond glowing like molten gold, blushing in rose petal pink or shimmering with a deep, oceanic blue.

considered one of the most important blue diamonds ever discovered. Sotheby’s expects it to be auctioned off at $20 million in May. A 40.29-carat radiant-cut fancy light pink diamond ring ...