Harkin's Jewellers declares itself to be the oldest jewellers in the West End, and to be honest I'm inclined to believe them. They have a lovely selection of jewellery, with something to suit nearly every price range. (Pieces start from £20/£30). The shop is well designed and feels authentically vintage.
Once inside, you'll be greeted by the friendly owner of the shop. He certainly knows his stuff and is really helpful. As well as selling jewellery, Harkin's also does jewellery repairs - so its well worth a visit if you've got a faulty piece of jewellery. The repairs aren't expensive, either, which definitely helps!
Finally, Harkin's Jewellers is also a registered buyer of gold. So if you have some unwanted gold and want to sell to a legitimate buyer (and actually get the correct amount of money for it) then make a trip here. read more