Until recently, only emerald, ruby and sapphire were officially called precious gems. Everything else was called semi-precious. The precious categorization is a reference to value: a really fine ruby, ...

Sotheby’s and Christie’s sold a combined $158,152,390 worth of jewels this week in New York, in sales that were dominated by spectacular named diamonds (flawless, colored, or huge), along with ...

The legendary “pigeon’s blood” ruby is poised to make a giant splash at Christie’s this fall. Two pieces of high jewelry featuring the exceedingly rare red gemstone will go under the gavel at the Hong ...