And you don’t have to head to Hatton Garden to find the vintage diamond engagement ring of your dreams – you can do it online ...

In general, it's probably safe to assume that a diamond-studded ring ... to be diamonds and a large, pearl-like stone. "Picked up an 18k gold ring at an antique shop today," they boasted.

We visited London jeweller Bentley & Skinner, which specialises in buying and selling rare antique jewellery. Some of the items it sells include a £275,000 diamond ring and an 1890 pearl and ...