Grading Diamonds
The BIG Diamond Certificate is essentially a statement attesting to the authenticity of a diamond. BIG expert gemologists use state-of-the-art equipment in order to accurately assess the diamond's 4Cs (Carat, Cut, Color, Clarity) and all other relevant characteristics, such as milkyness. Additionally, each diamond is scientifically analyzed for the identification of synthetics, simulants and possible treatments. Final results will be recorded on the BIG Diamond Certificate. Upon request we can give apprisal as well according to the Rapaport reports. Objectivity and independence are the hallmarks of all BIG reports and services, we ensure a diamond’s anonymity through the grading process. Upon arrival to the laboratory, every diamond is placed in a custom designed, transparent storage case, and all references to its owner are removed or concealed. It receives a unique internal identification number that is used to track it throughout the process.
Colored stones
The BIG Identification Certificate is based on a precious stone analysis, which is designed to identify the species and variety of a colored gem. Since new technologies are continually being developed and applied to alter and treat rubies, sapphires, emeralds, and other gemstones, the BIG scientific approach is vital to ensure optimum reliability. The Certificate clearly states whether the stone is natural or synthetic, provides other data describing its shape, cut, weight, measurements, color, transparency, and major characteristics, and also includes a detailed photograph of the stone. Country of origin is stated on the report if the gemological analysis conclusively reveals it. Final results will be recorded on the BIG Colored stone Certificate. Upon request we can give apprisal as well according to the Rapaport reports. BIG applies the same item identification and tracking procedures to gem identification as it does to diamond grading. Each item receives a unique internal identification number that is used to track it throughout the process. And at every step, special inspection, care, and handling procedures serve to protect a gem’s identity and ensure it is managed with the utmost care.