About GRC

The GRC laboratory has a long-established reputation for providing timely and accurate gemstone reports for our clients, as well as serving the industry as a whole via our extensive contributions to gemological research. Being equipped with the latest advanced technology, we ensure that our gemologists are trained and up to date on the latest identification and analysis methods. The lab offers a variety of testing and certification to meet your needs. GRC research efforts include the characterization of natural gem materials to understand gem formation, trace element chemistry, causes of color, and geographic origin when possible. Key focus areas include treatment detection and the separation of natural from synthetic gem material. Through research and unbiased gem grading and analysis, GRC strives to protect the gem and jewelry buying public by setting global quality standards.

Today, GRC is one of the world’s leading gemmological labs, especially for high-end coloured gemstones, diamonds and pearls. GRC provides independent expert advice in the field of precious stone analysis to a wide clientele. Among them are precious stone dealers, jewellers, auction houses and private customers from many countries. The GRC laboratory primarily examines loose cut stones, but set stones in jewellery pieces are also tested. Test reports are written in English, with an option of providing Chinese versions too. However, the test reports issued are for identification only and do not provide a commercial evaluation.