On-site testing

We regularly travel worldwide for on-site testing to test prestigious coloured gemstones.
Please note that diamonds and pearls are not tested on-site.

Testing prices
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Upcoming on-site testing

7 – 16 January 2026 Bangkok

2 – 6 February 2026 Tucson

26 February – 8 March Hong Kong

7 – 10 May 2026  GemGeneve

27 May – 5 June 2026 Bangkok

12 – 21 August 2026 Bangkok

11 – 21 September 2026 Hong Kong

Bangkok

We regularly travel to Bangkok for on-site testing to analyse prestigious coloured gemstones. Our office is in the gem trade district at the Silom Road. We are equipped with our mobile instruments and spectrometers, every gemstone is meticulously analysed. 

Please note that diamonds and pearls are not tested in Bangkok.

SSEF in Bangkok:

7 – 16 January 2026

27 May – 5 June 2026

12 – 21 August 2026

For questions contact +66 (0)81 257 75 20 or +66 (0)81 844 33 52 during Bangkok on-site testing.

SSEF office in Bangkok:

Swiss Gemmological Institute SSEF, Silom 19 Building, Unit 513, 5th Floor, 45/1 Soi Silom 19, Silom Road, Bangrak, Bangkok 10500

Hong Kong

Hong Kong is one of the most important hubs for the gemstone and jewellery trade.

SSEF in Hong Kong:

We will next be present at the March 2026 shows. 

Please note that diamonds and pearls are not tested in Hong Kong.

Apart from testing your gemstones at the jewellery fairs, we also offer a pre-show testing services at our Hong Kong business centre, located in Central. This pre-show service is by appointment only.

  • 26 – 28 February 2026, pre-show testing (by appointment only)
  • 2 – 6 March 2026 AWE, booth TBC
  • 4 – 8 March 2026 CEC, booth TBC

Appointments

Please contact SSEF in Switzerland. Our local phone number in Hong Kong (during SSEF presence in HK) is +852 649 649 94

USA

SSEF in Tucson:

We will next be present at the AGTA GemFair Tucson from 2 – 6 February 2026 (East Galleria). 

Please note that diamonds and pearls are not tested in Tucson.

GemGenève

SSEF at GemGenève:

We will be present at the GemGenève show from 7 – 10 May 2026.

You can reach us at the booth through this number: + 41 79 219 72 38.

Please note that diamonds and pearls are not tested in Geneva.

More information about this show can be found on gemgeneve.com.

Have you heard about our shipping services ?

Please note that items for testing can easily be shipped to SSEF using our shuttle services. This method, proven for many years with our shipping partner Ferrari, is the fastest way to obtain a fast expertise for your items.

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