Lab-grown diamonds are graded and certified using the exact same process as mined diamonds. Both mined, and lab-grown diamonds are evaluated using the 4c's - cut, clarity, color, and carat. Each diamond is sent to a specialised gem lab for grading. 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.
Each 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. The lab has no stake or interest in the sale of the diamond, and their aim is to evaluate each stone on its merit.
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. This document describes a diamond, and it's characteristics.
IGI
The International Gemological Institute (IGI) was established in 1975 and has headquarters all over the world. Their independent laboratory carefully studies lab-grown diamonds to determine authenticity.
Following the assessment, the experts compile an IGI lab-grown diamond report to outline the results. This is an important document as it verifies the diamond.
IGI employs a team of expert gemologists to scientifically determine the quality of each diamond. Gems are graded against certain criteria, and this criterion is based upon four elements.
Legitimate lab-grown diamonds will come with an official certification to specify their origins. IGI certificate is a guarantee of the diamond quality.
Futurae Lab-Grown Diamonds include an IGI Certificate on all stones exceeding .30ct.
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