Will a PGGL Report make our diamonds worth more?

A PGGL report will give you an accurate assessment of value because in addition to precisely measuring the proportions, the light behavior, you also get color, and fluorescence grades based on ImaGem’s latest technology. Also, the location and size of flaws as they appear in the diamond are captured both for identification and for exact clarity grading.

Will a Light Behavior Certificate influence my diamond’s value?

A light behavior report gives you a better assessment of a stone’s appearance. There are many stones which have beautiful appearance but they may not be close to an ideal cut. PGGL which reports direct measurement of light behavior will give you a light behavior assessment that is marketable.

Why should my store offer a PGGL report when our diamonds already have lab reports?

A PGGL report gives you a more precise value of your diamond by using ImaGem’s latest technology, which is highly repeatable and accurate. A PGGL Report also gives you the light performance of your diamond from direct measurement. Light Performance of a diamond is the latest new characteristic now used to assess the value of a diamond. A PGGL report also shows how well a diamond has been cut based on its proportions, polish, girdle thickness, axial, girdle and table symmetry.

Why should I get a PGGL Diamond Grading Certificate when I already have one from another lab?

A PGGL Certificate gives you very precise measurements of your diamond by using latest technology from ImaGem, which is highly repeatable and accurate. A PGGL Report also gives you the light behavior of your stone from direct measurement. Light Performance of a diamond is the latest new characteristic now used to assess the value of a diamond. PGGL report also tells you how well a diamond has been cut based on its proportions, polish, girdle thickness, axial, girdle and table symmetry.

Why is PGGL’s proportion grading superior to other methods?

PGGL uses superior gauging technology developed by ImaGem. For eg: the grading machine can measure directly the shape of a diamond and its table as well as obtain proportions from the side view. Other systems do not have this capability. Except for crown angle, the accuracy and repeatability of proportions is maintained throughout the range of sizes of diamonds that can be processed by ImaGem. Other systems may require change of lens, and recalibration which may or may not be done correctly in the field. Lastly ImaGem reports its results upto 3 decimal places rather than 2 decimal places used by other systems. The error of the equipment used by PGGL is considerably smaller and other systems used by existing labs.

Why is PGGL Proportion grading superior to other methods?

PGGL uses superior gauging technology developed by ImaGem. For example, the grading machine can measure directly the shape of a diamond and its table, as well as obtain proportions from the side view. Other systems do not have this capability. Except for crown angle, the accuracy and repeatability of proportions is maintained throughout the range of sizes of diamonds that can be processed by ImaGem. Other systems may require change of lense and recalibration, which may or may not be done correctly in the field. Lastly, ImaGem reports its results up to 3 decimal places rather than 2 decimal places used by other systems. The error of the equipment used by PGGL is considerably smaller than other systems used by existing labs. (ImaGem +/-5 microns, Sarin etc)

Why is PGGL color grading superior to other methods?

PGGL uses ImaGem’s patented technology which measures color based on 40 readings all around a diamond. These measurements are highly repeatable. The results of the machine color grade are further reviewed by trained gemologists for discrepancy. Most other labs rely 100% on human judgment.

Why is PGGL Clarity grading superior to other methods?

The system utilized by PGGL accurately images and maps the size and location of flaws in a three dimensional space within a diamond. The image can be used to identify a diamond as well as make an accurate assessment of the size and location of flaws. For eg: PGGL uses a clarity measurement system that can see a pinpoint as small as three microns (a typical hair is 30 microns thick). The clarity grade is reviewed by a trained gemologist for any aberrations. This approach combines the best and the latest in imaging technology to measure defects or flaws with expert judgment. Only labs using ImaGem’s technology have this capability.

What is the difference between PGGL Light behavior and other labs?

There are two approaches that are promoted by different parties in regards to evaluating a diamond based on light performance. Direct measurement of light behavior is developed and promoted by ImaGem. This is a patented technology and takes into account color, clarity, internal crystalline structure, and subtle nuances of faceting in a real diamond. In the second approach, proportions only are used to model or simulate how a diamond will perform. PGGL believes direct measurement of light behavior is the right way to go because you can measure light performance in a real diamond.

What is diamond fingerprinting? How will it help me?

Diamond Fingerprinting is a non-invasive service that measures and stores characteristics of your loose or mounted diamond in a secure database. These unique characteristics are used to verify your diamond at a later point in time.

If the diamond is ever lost, stolen or switched, we can help with identifying the registered diamond. Stolen and missing goods must be reported to appropriate local and federal authorities, insurance companies and your ImaGem-Secure service provider. The service provider will then coordinate with the authorities and other involved parties to identify the diamond from recovered goods.

What is a moissanite grading certificate?

A moissanite grading certificate is a document that describes the quality of a moissanite that it accompanies. Certificates are issued by an independent Gemological Laboratory. The certificate describes the quality of a moissanite based on the four C’s (color, clarity, cut, carat weight) and proportions. Some certificates include a plot diagram of the diamond with markings of its clarity features (inclusions).

What is a diamond grading certificate?

A diamond grading certificate is a document that describes the quality of a diamond that it accompanies. Certificates are issued by an independent Gemological Laboratory. The certificate describes the quality of a diamond based on the four C’s (color, clarity, cut, carat weight) and proportions. Some certificates include a plot diagram of the diamond with markings of its clarity features (inclusions). Certificates play a critical role in the assessment of a gem’s value.

What differentiates PGGL Light Behavior Report from a Gemex Light Performance Report?

PGGL uses ImaGem’s direct measurement of light behavior. ImaGem and Gemex both use the direct measurement approach to assess light performance but there are several differences in the two core technologies.

ImaGem uses three main factors to measure a diamond’s light behavior: brilliance, sparkle and intensity. The choice of these measurements was based on theories of human perception (i.e. how we actually see something) combined with tools for measurement of light return that are scientifically accurate.

Additionally ImaGem provides repeatable numerical measurements for brilliance, sparkle, intensity and overall light behavior that are translated into grades.

How will Light Behavior Reports improve our sales?

A light behavior report gives you a better assessment of a diamond’s appearance. There are many diamonds which have a beautiful appearance, but they may not be close to an ideal cut. PGGL, which reports direct measurement of light behavior, will give you an assessment of value that is marketable.

How is the PGGL Diamond Grading Certificate unique?

PGGL uses ImaGem’s direct measurement technology and equipment in conjunction with expert trained gemologists for grading diamonds. Essentially, a PGGL Diamond Grading Certificate is the same as what other labs are offering. However there are differences in the methodology used for grading the diamonds- PGGL uses ImaGem’s direct measurement technology in combination expert trained gemologists to give an accurate and reliable assessment of your diamond.

How is a PGGL Diamond Grading Certificate different from what other labs are offering?

Essentially a PGGL Diamond Grading Certificate is the same as what other labs are offering. However there are differences in the methodology used for grading the diamonds. PGGL uses ImaGem’s direct measurement technology in combination expert trained gemologists.

How can I benefit from the ImaGem-Secure fingerprinting service?

A diamond, besides its monetary value, has sentimental value to many consumers. It is not uncommon that a diamond is lost due to theft, switching or loose prongs/faulty mounting. The ImaGem-Secure fingerprinting service uses hierarchical imaging techniques to record detailed information on a diamond. This information is used to confirm a diamond’s identity.

The fingerprinting service is non-invasive and does not harm the diamond in any way. Along with verification, the consumer can have peace of mind that if a diamond is stolen, it may be possible to recover it. If a diamond is switched, it is possible to prove that it has been exchanged, and in case a diamond is lost, it is now possible to find a closest match both in size, color, clarity and appearance based on light behavior.

Can a PGGL Report lower my diamond’s value?

A PGGL report will give you an accurate measurement that is supported by facts and therefore is more reliable than measurements that are based on assumptions and less accurate information.