New automated system can run through 500 carats of stones at once.

The De Beers Group of Companies’ International Institute of Diamond Grading & Research (IIDGR) has unveiled the new Automated Melee Screening (AMS) device at the Shenzhen International Jewellery Fair and Hong Kong Jewellery & Gem Fair.

The new AMS device can run through 500 carats of melee stones at once, using a spectrometer-based system that screens round brilliant diamonds from 0.01ct to 0.2ct for potential synthetics and simulants.


It automatically feeds, measures and dispenses at a rate of 360 stones per hour and is the result of several years of development, exhaustive testing and production.

According to De Beers, the device has already been installed successfully across key worldwide diamond trading hubs to increase trade and consumer confidence in this category of diamond.

The president of The IIDGR Jonathan Kendall said: "The De Beers Group of Companies is committed to sustaining trust in diamonds across the industry. It is essential that all synthetics and simulants are fully disclosed to ensure confidence and transparency is maintained within the trade. The AMS device, the latest instrument to be developed by De Beers is able to aid in this assurance by screening melee and detecting all synthetics and simulants tested.”

The IIDGR used its appearance at the two Asian shows to showcase its other screening equipment, including its DiamondSure screening device, which determines natural 0.10ct to 10ct diamonds from synthetics and simulants.

Its DiamondView desktop-based device was showcased, designed to look at any stones that have been referred by DiamondSure, while its DiamondPlus kit was on show, allowing users to screen for type II HPHT treated natural diamonds and CVD synthetics.

Kendall added: “We are the leading manufacturers of detection instruments for the diamond industry. Our proprietary equipment is used as the de-facto standard by government agencies, gemmology laboratories, Diamantaires, jewellery manufacturers and jewellery retailers all over the world.”