Bonuses may have been burning a hole in the pockets of City high-fliers over the last few weeks, as rock-bottom interest rates and economic uncertainty leave many unsure about where to put their cash. Wealth Bulletin kicks-off a four-part series looking at which tangible assets make the best investments - starting with a girl's best friend.

Diamonds may not share the "haven" status of gold and their prices are more volatile than the precious metal, but they are increasingly being considered as an asset class in their own right, as the industry grows in sophistication.