I bought a pair of diamond studs from Quality Diamonds after finding them online and reading the other Trustpilot reviews. They are based in an office and just feel a little more professional than some of the shops within Hatton Garden. Sitting down with Eric to choose the diamonds is like a lesson in gemmology. He patiently explained the 4 "c's" and sensibly advised what to look for in a diamond to achieve best value and best quality. Amazingly you choose from diamonds that are for sale across the world so the choice is pretty much unlimited meaning you buy exactly what you want not what the shop has to sell you. The diamonds are then shipped and set all in within 10 days or so. I ended up with a beautiful pair of ear studs in a D colour, something I never thought I'd have achieved for my budget. Super pleased and a very pleasant shopping experience. Completely recommend and will be back for when I'm in the market for more diamonds.