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AGL PRESTIGE REPORT

The AGL Prestige Report is the jewelry industry’s most comprehensive colored gemstone report.The AGL Prestige Report comes in three different versions based on the level of information you desire:

• AGL Prestige Standard ID and Enhancement Report
• AGL Prestige Origin Report, including ID and Enhancement
• AGL Prestige Grading Report, including Origin, ID and Enhancement

AGL Prestige Origin Report, including ID and Enhancement

AGL Prestige Grading Report, including Origin, ID and Enhancement

AGL Color Rating Scale

Since there are so many optical/physical principles involved in the reflection and re-reflection of light through a gemstone, any particular gem can exhibit a wide range of colors. The color grade is based upon the purity of primary color. For example, the greener the emerald, the redder the ruby, or the bluer the sapphire, the lower the numerical grade on an AGL scale. For example, a sapphire may receive a 3.5 on the color rating scale if it has 70% blue as its primary color. The less primary color, the higher the numerical color grade. For example, a 65% primary color would probably be graded a 4.5 color.

In establishing a base for international quality reference standards, AGL had to be sure that all gemstones from the best to the worst could be accommodated by the system. Therefore, the top of the scale has become almost a theoretical standard of excellence. Please do not ask for 1.00 to 2.00 color grades. Because of the AGL's stringent grading practices, a 3.5 color is usually the best color grade any gem will receive. A 3.5 colored gemstone on an AGL Grading Report is nearly synonymous with a D-color diamond on a GIA Diamond Grading Report. On rare occasion, AGL may find exceptional examples that will receive even better color grades.

AGL Tone Scale

Tone describes the lightness or darkness of a gemstone. Color considered alone, without taking into account tone, will lead to errors in interpretation. If a gemstone is too light in tone, the color will not be rich enough. Conversely, if a gemstone is too dark, it will sacrifice brilliancy.

AGL Clarity Scale

Clarity is defined as the degree to which the gemstone is free of inclusions. A good rule of thumb to remember is: You will probably not see inclusions in a Lightly Included (LI) gem, you may see some inclusions in a Moderately Included (MI) gem, and you will probably see inclusions in a Heavily Included (HI) gem with the naked eye. Excessively Included (E) gems have durability problems and should be avoided.

AGL Cutting/Finish Scale

The cutting of a gemstone numerically describes the overall appearance of a gem. The finish grade refers to the polish quality of a gem. These are very difficult numbers to obtain for a colored gemstone. Unlike diamonds which are cut according to strict mathematical parameters, most colored gemstones are cut for weight retention.

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