Indonesia Center of Gemology Lab. We open focus for Diamond Grading & Gemstone Identification. Located in central of Jakarta at Indonesian Gemological Association (ABAMI) Building. Our facility has new technology in gemology such as Raman and De Beer technonogy. COG lab is the first Indonesia gemological lab who bases on computerized which develop by gemosoft who help us to identification and manage the lab. More information please go to www.