Aquamarine has been popular since antiquity ... "Mandarin garnet" specimens are the most in demand and the most expensive. Spessartine gem quality stones are rarely larger than 5 to 7 carats ...

The top lot of the auction was a Toi et Moi ring with a 5.03-carat pear-shaped diamond and a 3.61-carat fancy vivid yellow ...

This wedding season, jewellery design experts trace the resurgence of vibrant gemstones, and share tips to help you add a ...