Nadia – OPSI Jewels

Free delivery

OPSI offers free delivery on all purchases

Free returns

Free 15-day returns on your order

Know-how

All our jewelry is made in Switzerland and benefits from the watchmaker’s know-how.

Traceability

We guarantee that all our diamonds are from recognized sources and do not come from a source of conflict, in compliance with Swiss law and WDC SoW guidelines.

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Terms and conditions of sale