Next OPT in New York

Once again the Gübelin Gem Lab is bringing its expertise to you! Coinciding with the "JA Show New York", we are pleased to announce our next OPT service in New York and invite you to take this opportunity to benefit from our express testing service of all major gemstones with no express charge.

Date, Duration: 19 – 27 July 2017
Opening hours: 9 a.m. – 6 p.m.

608 Fifth Avenue
Suite 806
New York, NY 10020

Local phone: +1 212 956 0428
Local cell phone: +1 929 382 0771

For organisational purposes we kindly ask you to contact us in advance in order to arrange an appointment (call +1 212 956 0428 or e-mail

We would also appreciate an estimate of the number of stones you wish to submit for testing.