Presidium, a manufacturer of diamond and gemstone testing devices, is seeking reviewers from the industry for its ASSURE-certified Synthetic Diamond Screener (SDS II).

The SDS II is a portable option for companies that want to ensure the diamonds they sell are clearly identified as either mined or lab-grown.

It has been awarded the coveted ASSURE Tested Certification Mark and is the only ASSURE diamond verification instrument that retails for less than $1,000 (£765) while claiming to deliver 100% accuracy on the synthetic diamond referral rate.


It is suitable for both loose and mounted stones, including melees as small as 0.02ct, and can detect lab-grown from mined diamonds in just two seconds.

The launch of the ASSURE program comes as news agency Reuters reported this week that the US Federal Trade Commission, which investigates allegations of deceptive advertising, has sent warning letters to eight companies to insist they distinguish in advertisements between diamonds from mines and those made in laboratories.

Speaking about the ASSURE program, CEO at the Diamond Producers Association, Jean-Marc Lieberherr, said: “Through the ASSURE program, we will support the diamond trade, from independent jewellery retailers to large diamond manufacturers, to make informed decisions on how to ensure that undisclosed laboratory-grown diamonds do not enter their natural diamond supply chain.”

The ASSURE programme is a joint collaboration between the Diamond Producers Association (DPA) and Signet Jewelers.

Presidium is looking for testers specifically across Europe, the Americas and Asia.

The SDS II machine is available for a one-month free road test in return for a review that the company can post online.

If you are interested in taking part, please contact