We Buy Diamond is a leading buyer of GIA certified diamonds, loose stones, old Jewellery, diamond rings, wedding rings, eternity bands, gemstones and luxury watches. Our in-house gemologist specialists have more than 10 years of purchasing and selling valuable goods experience. We provide a quick postal system to the entirety of our clients so you can send us your goods securely and nothing out of your pocket. Get better deals on your jewellery for cash in London.