GUBELIN - GEM LAB - Off-Premise Testing (OPT)


Off-Premise Testing (OPT)


We are equipped to bring our expertise closer to our clients. Thanks to our transportable state-of-the-art equipment, we are able to set up a “mobile laboratory” abroad for the examination of coloured stones. At the moment the destinations we visit are New York, Hong Kong and Bangkok. The actual report is issued after the OPT at our offices in Lucerne and then couriered to the client as rapidly as possible. Please see our current OPT schedule for forthcoming OPTs.


To submit items for testing, clients are kindly requested to contact us in advance to arrange an appointment (tel. +41 41 429 1717 or fax +41 41 429 1734). We test gemstones on a first-come, first-served basis.

Off-Premise Testing