Established in 2003, Global Gem-testing Laboratory Limited GGL is a reputable gemological laboratory situated in Hong Kong that specializes in providing professional gemstone or jewelry identification and grading services. Utilizing advanced techniques and equipment, GGL evaluates the quality and authenticity of gemstones with an emphasis on precision and dependability. GGL’s team of experienced gemologists and specialists are committed to deliver expert assessments of gemstones. GGL have gained a reputation as a trusted brand in the gemstone industry and has served a diverse group of clients over the years.

GGL takes pride in our comprehensive range of services that encompass gemstone identification, grading, and certification. Highly-detailed reports present an in-depth analysis of a gemstone’s various attributes, including color, clarity, cut, carat weight, measurements, transparency, etc. Objective and impartial reports enable one to make well-informed decisions.

Trust is essential when it comes to gemstone reports. It is proud to be an independent and unbiased laboratory. Reports are based solely on the results of professional analysis, and do not have any affiliations with gemstone dealers or manufacturers.

Offering accurate and reliable gemstone grading and certification services, by the greatest levels of professionalism, integrity, and ethical behavior by well-experienced gemologists.

Committed to provide expert assessments of gemstones. Using state-of-the-art equipments and advanced techniques to evaluate the quality and authenticity of gemstones with utmost precision, reports are recognized and respected worldwide, and are trusted by leading gemstone professionals. Aimed to maintain the highest standards of quality and integrity, commitment to excellence and unbiased make GGL a trusted name in the gemstone industry.