If you plan to buy an engagement ring for your loved one this Valentine's Day, you might need these expert tips.

Amethyst . A member of the quartz family, amethysts with intense, rich purple shades have long been considered the most precious of these n ...

The 'Treasures, Royal Gems & Jewellery,' colloquium held in Lisbon explored the history, preservation and public role of royal gems and jewels ...