The Gem Testing Laboratory of "NGJA" which was established in 1972 was entrusted with the task of issuing authentic Gemstone Analytical Reports, with the view to gain confidence and integrity in International gem trade. The laboratory is presently staffed with internationally trained Gemologists with internationally accepted professional qualifications.

Our laboratories are equipped with most advanced gem testing equipment to offer the best services during the shortest possible time frame. Our expertise lies in offering Services for Coloured Stone Testing and Gemstone Treatment Identification. To ensure optimum quality, our laboratory is constantly surveyed by "SLSI" to ensure that all the equipment are functioning in optimum level. We also keep updating our technological strength and this has enabled us to serve customers in the best possible manner.

Our Promise
For Clients

Provide accurate & easy to understand selection standards to consumers through the disclosure of information.

For Society

Provide supportive services in compliance with laws & regulations to society in sincere & earnest way.

Coloured Gemstones Reports

The "NGJA" coloured Gemstone Certificates are designed to identify the species and variety of a coloured gem.

The "NGJA" coloured stone report clearly states whether the stone is natural or synthetic, provides other data describing its shape, cut , weight, measurements, Colour, transparency and major optical characteristics. The treatments (Heat/Unheated, beryllium…..etc.,) are disclosed on the report according to the customer requirements. An authentic "NGJA" Laboratory Report is the common language of trust and confidence in the gemological world.

Buying a Gem with a "NGJA" Cerificate

You will know exactly what you are buying. Every important factor you need to know about the stone is described in the Certificate. The seller knows exactly what he/she is selling to you so as to avoid any misunderstandings in the future.

If a stone comes with a NGJA Certificate in, you do not have to worry about the possibility that you might be purchasing a fraudulent item. Purchasing a NGJA certified stone will simply provide you with much more confidence and value.

NGJA has equipped itself with the most technologically advanced equipment available for the use in the identification and authentication of colored gemstones. The following instruments are used for in-depth analysis of gemstones, in the NGJA Gem Testing Laboratory.

• Energy Dispersive X-Ray Fluorescence Spectrometer (EDXR)

• Fourier Transform Infrared Spectrophotometer (FTIR)

NGJA Gem Testing and Certification Laboratories are located in Colombo Head Office,