Since its first reported use by the ancient Babylonians the emerald has long been a popular choice of gemstone, with historical figures including Cleopatra holding them in high regard. Colombia and Zambia are the two main centres for modern emerald production, with Zambian emeralds being highly sought after for their strength and purer hues, making them the perfect gemstone for...

The rarest of all forms of topaz, blue topaz is a highly coveted gemstone. While most forms of blue gemstone have been treated to produce a richer blue, naturally-occurring blue topaz does exist, although not in the rich, deep hues most people are used to seeing in blue topaz rings and other forms of jewellery that sport the gemstone. History...