HRD Antwerp is going to introduce its D-Scope DV4 portable microscope created for the diamond market, at the JCK Las Vegas Show. The device is a high-quality stereo zoom microscope with gem manipulator and vacuum system. It is built with a sophisticated illumination system of unique halogen darkfield lighting and LED-top lights to enable quick examination. %% Those visiting the HRD Antwerp pavilion during the Show can also test the HRD Antwerp D-Screen, which is the first compact device able to distinguish natural from synthetic colourless or near-colourless polished diamonds. It indicates if a polished diamond is natural and if it has been subjected to colour enhancement. Synthetic diamonds and diamonds subjected to a HPHT-treatment are instantly detected. The technology used is based on optical measurement by projecting shortwave UV radiation through the diamond.