The rough stone naturally contains many small, even microscopic, impurities. Inclusions should first be clearly visible before virtually plotted for planning. Any inclusion missed out in planning will not be missed out while grading. The result will be a lower grade of polished diamond.

The Multi-zone base light is a revolution to visualize inclusions. It incorporates separate, multiple, step-less variation controls for brightness. The controls are operated through software and available in operator’s current working area. The purpose is to have flexibility without loosing concentration. You need not to look beyond your computer screen to set up ideal lighting condition. Best illumination conditions can be set to view inclusion & its exact position. This innovative base light provides bright & dark field as well as combined illumination facilities for making inclusions most visible.

The Technology:
Without proper illumination it is impossible to get a good idea of an impurity (surface or included) in rough. Dark & bright field illumination techniques are better known as contrast enhancement techniques. Also, combination of the two gives a more complete vision of inclusions than either of them can give separately.

• Bright-field illumination gives very fine details with little contrast. Bright field illumination can be used to observe multiple kinds of surface characteristics of rough stone like growth lines, piques, crystal or minor surface inclusions. This illumination technique creates a brightly lighted background field against which surface inclusion appears as high contrast dark inclusion which can be easily detected.
  
  
• Dark-field illumination has been developed to enhance the contrast of the image. Inclusions smaller to visualize in normal illumination can be made visible simply because they light up. The feathers/glets, cleavages, clouds can be easily observed under this illumination set-up. Other smallest inclusions can also be observed with great ease.
  
  
• Combined illumination technique (provided with multi-zone base light) can be utilized to provide advantages of both illumination techniques. This provides most flexible way to set up illumination to identify inclusions.