DiamAlps
4.3 / 5Zurich · established 2013
DiamAlps is a Swiss diamond merchant (a brand of Yazam GmbH) that arranges in-person viewings in Zurich and trades stones certified by GIA or HRD. They run on appointments rather than a shopfront, with offices reaching from Geneva and Basel to Antwerp and Hong Kong. The focus is loose certified stones and investment-grade diamonds, so you choose the diamond before any setting.