Simply sign up to the Tiffany & Co myFT Digest -- delivered directly to your inbox. It is time to redefine one of the best-known clichés in the English language. “A rough diamond” imputes true beauty ...

Jewellery design’s latest shift isn’t about bigger stones or brighter sparkle. It’s about leaving gems exactly as they were when they were prised from the ground. Unpolished, rough stones are being ...