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Presentation ASET®

The Presentation ASET has high-grade optics through which you and your customer can easily view the optical performance of loose or mounted diamonds. The ASET can be used to demonstrate the light handling capabilities of a faceted diamond. With the ASET manufacturers will make better decisions when cutting diamonds, retailers will make better decisions with diamond selection, and consumers will make better buying decisions. Available to AGS members only

When a diamond is viewed through the ASET, a color-coded image is seen. The different colors show the angles from which the diamond gathers light:

Green = 0º (horizon) to 45º
Red = 45º to 75º
Blue = 75º to 90º

Red represents light coming from angles where there is likely to be bright, direct sources of illumination in most viewing environments. This color is dominant in the ASET image of a well-cut diamond.

Blue corresponds to light that normally is blocked by the viewer’s head and body. An ASET image with a moderate amount of this color in an attractive pattern means the diamond has good contrast.

Green is produced by low-angle light, which usually is reflected from walls or other objects in the surrounding area (rather than coming from direct sources). A diamond with a high cut quality may show small amounts of this color around the bezel area of the ASET image.

Black or White appears in areas that do not return light under real-life viewing conditions. If a diamond is well cut, the ASET image will show only very small areas of black or white around the outer edge (and perhaps none).

Green = 0º (horizon) to 45º
Red = 45º to 75º
Blue = 75º to 90º
Black or White = indicates leakage

Presentation ASET® Member’s only:  $495.00

Please contact for availability.

If you have any questions, please contact

U.S. Patent Nos.: 7,336,347 – 7,355,683 – 7,372,552 – 7,382,445 – 7,420,657