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GRC is providing certification to loose stones and mounted in the Jewellery form colored stones to Diamonds.

GRC, a company with a team of highly qualified Gemologists including GIA qualified Graduate Gemologists of many years of experience in gem testing and certification services.

Our laboratory is equipped with advanced instruments which are of high quality and reliability so we can assure test report what we issued.

Our customers can check their certificates online from anywhere in the world giving the much-needed comfort to a potential buyer or an owner of a gemstone to validate the authenticity of all certificates we have issued.

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Our Services

Gem Research Center, We conduct laboratory services, research, and have instruments needed to accurately and objectively determine gemstone quality.

Gem Testing for all treatments

gem certification

diamond testing

GEM Research

Need a help?

Get In Touch Us

Address : No: 33A, Fenando Avenue, Negombo, Sri Lanka.

Phone : +94 314 550 558

e-Mail :

Web :


Scan QR code to quick validate your Gem Certificate