Has GIA invented the synthetic diamond “black box”?

Rob Bates

At last year’s forum on undisclosed lab-grown diamonds, Gemological Institute of America chief laboratory and research officer Tom Moses noted that jewelers have long yearned for an easy-to-use, synthetic-sniffing “black box” that costs $99 and fits on a countertop.

Last week GIA announced a device which, while not filling those exact criteria, comes pretty close.

The still-unnamed device, which will be released this fall, offers the following features:

– It screens man-made diamonds as well as 97 percent of all HPHT-treated stones.

– It detects simulants, including the new moissanite that can fool moissanite testers.

– It can be used on natural mounted and unmounted D-to-Z diamonds, from 0.005 cts. and up.

– It does its business in a few seconds.

– It does not require any special training to use.

And, as they say on late-night TV, that’s not all. The new gizmo may eventually screen pink diamonds (though not other colors) and even colored gemstones. Those changes will likely be added through software or hardware updates, meaning users won’t need to buy a new device.

Here are the caveats:

Like other devices, GIA’s new gadget does not detect synthetics and treated stones outright, but refers them for further testing. Other screeners, however, mostly look for Type IIs. This does, too, but also takes other criteria into account, so it has a lower false-positive rate than past machines, says Moses.

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Source JCKOnline