Reply from Gage DiamondsJul 11, 2022
Hi Vernysha, this is untrue. Our vendor has provided a signed letter from their Senior Gemologist stating that the item purchased contains lab grown diamonds and not moissanite, which we shared with you.
"Stuller Inc. is offering Laboratory-Grown Diamonds (LGDs) since 2016.
As part of its zero-tolerance policy for undisclosed LGDs, since 2018, the company runs one of the world largest diamond screening operations on all its diamonds, of both natural and lab-grown origins, to confirm their identity. The operation includes a fully dedicated in-house GIA melee analysis service run by GIA personnel and 63 diamond screeners and advanced instrument machines run by Stuller associates and gemologist specialists. Every stone, from 0.008mm is screened by at least two technologies.
Some of Stuller’s LGDs vendors, mainly those that grow diamonds using the HPHT method, are using a modified technique. They add an element called Boron into the original growth mixture to improve the quality of the end-product and increase efficiency of the process.
Recently, scholars reported that this modification may cause LGDs to slightly change their properties and react differently to some testing devices. Several reports specifically stated that these products might be falsely identified as a moissanite mineral, commonly used as a diamond simulant, by thermal and electrical conductivity probes (known in the trade as “diamond testers”).
Please refer to the link below, published in the Journal of Gemmology (one of the world’s most important scientific publications of gemology), for more information:
https://assets.stullercloud.com/das/105192024.pdf
Stuller is aware about this issue and, therefore, avoid using these old diamond testers in its screening operation. Instead, Stuller teams confirm the identity of all LGDs using state-of-the-art spectrometers and imaging devices, as done in leading gemological institutes.
Unfortunately, although Stuller pushes to encourage awareness about the irrelevancy of diamond testers in testing of LGDs, many jewelers and pawn shops are still relying on these old tools. The truth is that, as these tools were invented 50 years ago, their technology simply cannot comply with the current market products."
