HGL The Cape of Good Hope Gem Laboratory (Hong Kong) is one ofthe top ten gem research institutes in the world. The main testing business scope mainly includes: cultivated gemstones,diamondscolored gemstones,jade,organic gemstones,and precious metals. Adhering to the principles offairnessimpartiality, science, and integrity, we are dedicated to providing high-quality services for jewelry testing and appraisal forour customers