18 Aug 2022
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Synthetic Diamond Identification Machines-Improved diamond detection machines
By: Diamond World News Service
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Oct 24 2015 3:52PM
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Reference: 12136  

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Diamond companies are leaving no stone unturned to overcome the unethical practices of mixing of undisclosed/lab-grown diamonds with natural diamonds. Trading in misrepresented or undisclosed products, whether inadvertently or not, could cause irreparable damage to the business reputation and could be viewed as fraudulent.
Furthermore, such irresponsible practices could undermine the integrity of the entire diamond supply chain, damaging both trade and consumer confidence in buying diamonds. In this regards, a lot of technological development has taken place in the last few years. With the new development and innovations, a number of user-friendly diamond detection machines have been launched, which needs no expertise of a gemologist or a spectroscopy expert.
At the end of 2013, technology was already available to detect synthetic diamonds but the first generation of detection technology had focused on screening larger gems. There was no cost effective method of screening large scale parcels of melee diamonds.
Research and development efforts were accelerated to address this issue and De Beers’ Technologies team, together with the International Institute of Diamond Grading & Research, developed the first compact, portable melee screening device.
There have been host of new machines like Automated Melee Screening (AMS) from De Beers, M-Screen from HRD Antwerp, D-Secure from Dharmanandan Diamonds, DiamondCheck from GIA etc. The diamond detection machines have been installed at the leading diamond bourses and industry bodies especially the machines by De Beers, GIA, HRD Antwerp. Apart from this there are smaller and affordable machines like DiamaPen by HongKong-based Diamond Services Ltd, which is not only affordable but also useful for the diamond merchants while on the move.

Automated Melee Screening (AMS)
De Beers supplies “Diamond Sure”, “DiamondView” and “Automated Melee Screening (AMS)” devices. The AMS manufactured by De-beers is a useful and pivotal instrument for recognizing even minute-size diamonds. The AMS machine can swiftly identify synthetic stones in parcels of small diamonds ranging from 0.01-0.20 cts in an affordable manner. The machine aims to address the market requirement for fast and cost-effective detection equipment for smaller sized diamonds.
The AMS instrument is a spectrometer based system for automatically screening potential synthetics and simulants. The instrument is controlled by a computer using proprietary software. Stones placed in a hopper are automatically fed to a fibre optic probe connected to two spectrometers which are used to record spectra. Depending on the results the stones are then dispensed into one of four result bins. Around 98 per cent of colourless/near-colourless stones will pass and require no further examination. The AMS will refer for further tests all synthetics and simulants and around 2 per cent of natural diamonds. These referred stones can then be looked at on DiamondView™.

Key Features
• Compact table top model
• Screens colourless and near-colourless round brilliant cut diamonds in the 0.01-0.20 carats size range
• Fully automated instrument will take up to 500-carats at any one time
• Throughput of each instrument is approximately 360 stones per hour

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