Since new technologies are continually being developed and applied to alter and treat rubies, sapphires, emeralds and other gemstones, the GTLI scientific approach is vital to ensure optimum reliability.

The GTLI Colored Stone Report is based on a precious stone analysis, which is designed to identify the species and variety of a colored gem.

The GTLI Colored Stone Report clearly states whether the stone is natural or synthetic, provides other data describing its shape, cut, weight, measurements, color, transparency and major optical characteristics, and also includes a detailed photograph of the stone. The country of origin is stated on the report if the gemological analysis conclusively reveals it.

Gemstones should only change hands when accompanied by a certificate attesting to quality. Regardless of location or marketplace, an authentic GTLI Laboratory Report is the common language of trust and confidence in the gemological world.