Rubies and sapphires of exceptional provenance and signed jewels were among the top lots at Bonhams New York Fine Jewelry sale on Tuesday. This is to be expected at a Bonhams sale, as the auction ...

Emerald cut engagement rings are usually considered one of the most elegant of diamond shapes. After all, it is the stone on Grace Kelly’s engagement ring given to her by Prince Rainier of Monaco.

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, ...