If you're looking for something unusual but wearable this is the place for you. I've been visiting them for about the last 4 years and its always a revelation when I walk through the door. They do a really wide range of British designers, but not too wild and wacky (like some other shops I could mention). They sell British designers exclusively as well as doing their own ranges so its nice to shop somewhere that is doing good for the British high street IMHO.
The staff are all very well versed in their products and also very friendly. In fact I'm such a regular now that the manager always says a special hello when I walk through the door. They are a great place for gift shopping as well. I bought a lovely necklace for my sister last month and it went down so well she ended up going back and buying herself the earrings to match!
I think they have other stores around the country but I've only visited this one and the one in Oxford. They also have a website and Facebook and Twitter pages as well, but as you can't post links here you'll have to search for them. Its worth the effort though especially as they have some great competitions and offers going on at the moment.
Argenteus specialise in a range of silver and sterling silver jewellery.