77 Diamonds
4.3 / 5Zurich · established 2005
77 Diamonds sells online and also keeps a showroom in Zurich, so you can build a ring on the site or come in to design one in person. You pick a setting, then choose a loose diamond from a large searchable inventory, with prices shown as you go. Delivery is fully insured and returns run 30 days. The London-based firm has been trading since 2005.