Should you sell gold jewellery by weight or as a finished piece? Compare valuation methods, understand what affects resale value and choose the best option in the UK. Discover how gold purity, hallmarking, craftsmanship, brand reputation and current gold prices influence the amount you can receive. Learn the key differences between selling to jewellers, gold buyers and private purchasers, along with practical tips to help you avoid undervaluing your jewellery and make a more informed, profitable selling decision.