Global Gem Testing Laboratory Sri Lanka

We are an independent firm that identifies appraises and evaluates gemstones and jewellery. We perform these services for the jewellery trade and the public. We have with us highly experienced and qualified gemologists in our laboratory, with the membership of Alumni Association GIA, Gemologist Association Great Britain (FGA) and Gemologist Association Sri Lanka (MGA).

Member of Gemological Association of Great BritainAlumni Member of GIA

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Our Gem Certificates

Plastic card with gem image

Normal certificate with image

Advanced analytical certificate

Diamond Certificate with image

We assure you a precise and accurate test report at all time

  • Weight and measurement.
  • Colour and other optical and physical properties.
  • Species and variety of the specimens.
  • Identify thermal treatment (heat un-heated).
  • Oil treatment & lead glass treatment.
  • Cobalt & titanium treatment.
  • Beryllium diffusion treatment.
  • Country of origin.

Our Clients

Contact us

Head Office

5/3, Joseph’s Lane, Colombo 04,
Sri Lanka.

+94 11 450 3689, +94 11 433 0271
+94 72 782 4119, +94 76 821 3144
lab@ggtlsl.com

Beruwala Branch

GTC,44/2B,17/1,Sheikh Faccy Mawatha,
China Fort,Beruwala. Sri Lanka.

+94 11 4330270, +94 45 4546133
+94 75 5687391, +94 76 8213144
lab@ggtlsl.com

Kollupitiya Branch

Tian Long Mall (PVT) LTD
Tower 1, Unit 8A, No 9 Deal Place Colombo 3

+94 11 769 3077
lab@ggtlsl.com