Next Off-Premise Testing (OPT) in Bangkok

The Gübelin Gem Lab will be in Bangkok from 29th May - 8th June 2023.


29th May - 8th June, 2023

Opening hours:
9: 30 a.m. – 6:30 p.m.

29th Floor, Jewelry Trade Center Building, 919/363 Silom Road, Silom Bangrak, Bangkok 10500, Thailand

Local phone: +662 267 4442 or 4443
Local cell phone: +66 98 257 1049

For organisational purposes we kindly ask you to contact us in advance in order to arrange an appointment (call +852 2868 2781 or e-mail We would also appreciate an estimate of the number of stones you wish to submit for testing.


We look forward to meeting you in Bangkok.

Yours sincerely,

Gübelin Gem Lab


Learn more about our products and services