Costume jewellery by top names such as Dior, Chanel, Tirfari and Coro can be found for under £100 at auction. Look for a nice clasp and an original box.
Art deco gold and platinum jewellery is still in demand and could make anything from £1,000–£10,000. Rings with geometric forms are popular.
* 01223 213343; chef ns.co.uk