Figure 4 shows close ups of the GIA deep "Excellent Cut" (stone C from Table 1). Fig. 4.1, on a white tray*, shows light colored regions inside the table. Fig. 4.2, is the most attractive with better contrast; the stone is resting on the GIA's gray tray. Fig. 3.3 shows table leakage when the background is black.

Figs. 4.4 & 4.5 (ideal-scope and AGS ASET) shows leakage areas are light to white and indicate that little or none of the light from sources above the diamond can be returned to a face up observer. The DiamCalc light return for the table region only of stone (C) is 0.63 for a single eye and 0.74 for stereo vision.

Fig. 4.6 shows the stone resting on fingers; skin can be seen through the table region.

Figure 4. Close ups of the GIA deep "Excellent Cut" (stone C from Table 1): 1.- on a white tray; 2.- on GIA's gray tray. 3.- on black background. 4. & 5.- Ideal-Scope and AGS ASET photos. 6.- on fingers

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* - The white background appears gray because the camera was set (for all these photo's) to make an average exposure. Our eyes work in a similar manner; a diamond on a dark background will always appear brighter than the same stone on a light background.