Join laboratory-grown diamond expert Julia Griffith FGA DGA EG as she shines the spotlight on one of her favourite testing tools.
Undisclosed laboratory-grown diamonds are a threat to many people in the jewellery industry. Not only can they make their way into diamond parcels and jewellery as they are traded from business to business, but stories where they are unknowingly bought back into the trade from the public are surprisingly common. There has never been a more important time for those working with diamonds to learn how to identify laboratory-grown diamonds.
Luckily, many diamond screeners have been developed to help us with this all- important task. Screeners identify the majority of natural diamonds and refer potential laboratory-grown diamonds for further testing. When it comes to finding a reliable and affordable diamond screener, the Synthetic Diamond Screener II (SDS II) has proven to be one of the best in its class. The test is quick, easy-to-use and provides accurate results – making it a top choice for many professionals who work with diamonds.
Designed for colourless diamonds only, the SDS II will refer 100% of laboratory-grown diamonds for further analysis. These get the result ‘Type IIa’ – the diamond type of all colourless laboratory-grown diamonds. Users can rely on these results as the SDS II has scored a 0% false-positive rate from an independent testing program*. Meaning that no colourless laboratory-grown diamonds will be incorrectly identified as ‘natural’.
“When it comes to finding a reliable and affordable diamond screener, the Synthetic Diamond Screener II (SDS II) has proven to be one of the best in its class.”
The SDS II tests the transparency of stones to shortwave ultraviolet light (SWUV). This technology is best used on loose diamonds and those set in single-stone, open-back mounts.
The ARI by Presidium (ARI) is Presidium’s answer to client requests for a screener that can quickly test mounted goods. Designed as a probe, the ARI emits UV light and analyses the light reflected back from the pavilion of a facetted stone. It is important to note that this tester is best used on well-cut round brilliant cuts. Fancy-shapes may not produce reliable results due to the lesser amount of light returned from these cut styles. This instrument comes with the additional function of identifying synthetic moissanites.
These Presidium instruments are small, lightweight, and either powered by USB or batteries. They are the perfect desktop instrument and can be easily carried to different locations, and used in front of customers to increase consumer confidence.
Julia Griffith FGA DGA EG
Founder of The Gem Academy
* These results were obtained from the ASSURE Testing Program by the Natural Diamond Council. This data refers to colourless diamonds and colourless laboratory-grown diamonds only. This does not apply to colours outside the D-J range or diamond imitations. ** Orders into the UK will incur import fees