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ASET Scope PDF Print E-mail
The ASET™ Scope was developed by the AGS Laboratory and is used by them to grade optical symmetry within a diamond as part of their Light Performance rating system.  The ASET™ is similar to the Ideal Scope and its counterparts in that it uses filtered light to provide the viewer with insight into the optical symmetry of the diamonds, however that is where the two devices cease to be similar in concept or use.

ags0009098808scope_ideal ags0009098808scope_aset

The first picture shows one of our AGS Ideal 0 graded princess cut diamonds as seen through an Ideal Scope and the second photograph shows the same diamond as seen through an ASET scope.  The Ideal Scope is designed to demonstrate where light might be leaking through a diamond, but  the different colors  provided by the ASET image show the angles from which the diamond gathers light:

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

Black or White indicates leakage.

WHAT THE COLORS MEAN:

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.

Note that when Red and Green areas appear mixed together in the center region of the diamond (above the culet) this simply indicates a kind of crossover between the sources of illumination within the realm of the 45° viewing angle.

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).

No doubt you noticed from the Ideal Scope and ASET images of the AGS Ideal 0 Princess Cut Diamond above, the two images and the insight provided by each image is distinctly different and thus we recommend obtaining both an Ideal Scope and ASET image of a round or princess cut diamond before you purchase it regardless of whether you are buying a diamond online or from a traditional brick and mortar jewelry store - it really is an excellent way to determine how well the diamond you are purchasing has been crafted beyond the information provided on a lab report.


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