A 15.1-carat fancy vivid blue diamond will be offered at a single-lot auction at Sotheby’s Hong Kong in April, with an estimate in excess of U$S48 million (HK$380 ...

When Tiffany & Co. acquired an exceptional 71-carat rough vivid yellow diamond from Canada’s Ekati mine last summer, instead of cutting and setting it in a jewel as expected, its chief gemologist, ...

If you’re in search of a rock with serious value and a story to match, Maison Mazerea may be your new go-to. The Australian brand, which specializes in ultra-high-end fancy diamonds in unusual cuts ...

It’s unusual for Tiffany to tour a rough diamond, but this was a geological wonder, said Reynolds. “It’s very rare to find a diamond of this size and saturated color that came from hundreds of miles ...