This is an important document as it verifies the diamond. GCAL (Gem Certification and Assurance Lab) is currently the only. However, many diamond vendors offer EGL and other local certificates. We also offer in-house certificates for smaller diamonds. At Belgium Diamonds we offer mainly diamonds with GIA, HRD and IGI Certificates which are considered the 3 major certification laboratories in the world. Their independent laboratory carefully studies lab-grown diamonds to determine authenticity.įollowing the assessment, the experts compile an IGI lab-grown diamond report to outline the results. Also, once you are in the lab-grown category, youre comparing IGI versus IGI stones. The Difference Between Diamond Certificates. The International Gemological Institute (IGI) was established in 1975 and has headquarters all over the world. This document describes a diamond, and it's characteristics. Measurements (from GIA report): 5.68 x 5.54 x 3.91 mm. When a gemological lab such as IGI, GCAL, GIA, etc. If a diamond does not have a grading certificate from a reputable organization like the GIA, IGI, or GCAL, you should request that the diamond be certified to ensure it’s authenticity. Diamonds that are cut too shallow or deep may look small or lose brilliance. IGI has the technology to test for natural diamonds and this test is carried out. The best way to tell if a diamond is natural or lab grown is to look at the diamond’s grading certificate. GCAL is the only laboratory that guarantees its diamond color and clarity grades for two years with cash back for the difference in quality (although GCAL is the one who decides if the color or clarity grade is not accurate and they charge you a fee to challenge the grading report so this is pretty limited in scope.) GCAL creates custom. While there is there common language used in the grading of diamonds. Two of the most prominent grading labs are International Gemological Institute (IGI) and Gem Certification & Assurance Lab (GCAL), they both provide certificates for diamond and lab-grown diamonds. Princess cut GIA (report)/GCAL (cert), VVS1, I color, Excellent polish/symmetry, no florescence and two or three 'needle' or 'pinpont' inclusions as indicated on the GIA report when looking at the diamond from the pavilion. The International Gemological Institute IGI Brilliance Blog. The lab has no stake or interest in the sale of the diamond, and their aim is to evaluate each stone on its merit. The diamond certification lab will judge the diamond on how well it has been cut down from its raw form into a stone, how flawless and clear it is, as well as its size.Įach diamond is graded independently by several gemologists within the lab, and the individual grades are compiled and analyzed to determine the diamond's final grade. Each diamond is sent to a specialised gem lab for grading. Both mined, and lab-grown diamonds are evaluated using the 4c's - cut, clarity, color, and carat. Lab-grown diamonds are graded and certified using the exact same process as mined diamonds.