Forbes contributors publish independent expert analyses and insights. Kate Matthams Spencer is a Paris-based writer who covers jewelry. A 41.28ct, ice-blue diamond has been unearthed at the famous ...
ALBUQUERQUE, N.M. (KRQE) — It’s a “hydrated phosphate of copper,” but you may just know it as turquoise. The blue-green mineral widely regarded as a gemstone has significant deposits across the world, ...
“The Mediterranean Blue” is 10.3-carat fancy vivid blue diamond with a VS2 clarity grade. It's the highlight of Sotheby's High Jewelry sale in Geneva. Fancy vivid blue diamonds of more than 10 carats ...
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