Celinni Zurich

Celinni’s Zurich showroom is at Dufourstrasse 49, open by appointment from Tuesday to Saturday, and it backs onto an online inventory of more than 100,000 certified diamonds graded by GIA, IGI and HRD. The work centres on natural diamonds, and the family describes itself as working with them since 1967. Alongside loose stones, the showroom designs custom engagement rings and bespoke jewellery.

Buyers also get complimentary engraving and lifetime maintenance that includes free resizing every 18 months, plus repair and restoration. The private, appointment-only format suits someone who wants to compare a wide certified selection and then have a stone set into a piece made for them.