HRD Research on Monday presented a new screening device at the third Antwerp Diamond Conference. Called the D-Screen is, the organization said it is the first compact, affordable device able to distinguish natural from synthetic colorless or near-colorless polished diamonds.

The D-Screen indicates if a polished diamond is natural and has not been subjected to color enhancement. Synthetic diamonds and diamonds subjected to a HPHT-treatment are instantly detected, HRD Research said. The technology is based on optical measurement by projecting shortwave UV radiation through the diamond.

The D-Screen’s range covers all polished diamonds from 0.2 ct. up to 10 cts. in the colors D to J. This encompasses the bulk of gem grade diamonds.

To operate the D-Screen, place a stone in the device. It automatically starts measuring and in a fraction of a second the measurement is complete. A green light indicates with certainty a natural diamond that has not been subjected to color enhancement. An orange light means that the stone should be sent to a laboratory for further examination and a definitive conclusion.

The device measures 6 in. x 2 in. x 1.5 in. and uses batteries but it can also be used off an electrical outlet. D-screen is shipped with an adapter, a carrying case, a 9V alkaline battery and a CD with a manual and instructions.

From April 2005 the device will be available from Comdiam. It will cost approximately $3,200.

HRD Research is one of the largest diamond research centers in the world, employing about 30 scientists, engineers and researchers.

JCK