Having a grading certificate issued from a non-biased, third party laboratory on the diamond you are purchasing can be a very useful and valuable tool. However, you may notice that pricing among diamonds of the same carat weight, shape, color and clarity can vary greatly depending on the laboratory that issued that particular diamonds certificate. The scales of color and clarity used to grade diamonds were developed by the Gemological Institute of America (GIA). All laboratories use this scale, although not all use it to the same standard. What one laboratory grades a diamond for color and clarity may not be what another laboratory grades that same diamond. It is important to compare prices based on the same certificate. Diamond grading is subjective and at the discretion of the grader. Since price is directly related to quality factors (color, clarity and cut), accurate and honest grading is essential.
What does a diamond certificate say?
A diamond certificate tells you all about the diamond. Known also as diamond grading report and diamond dossier, the certificate discloses the 4Cs of diamonds – color, clarity, cut and carat weight.
In order to make the quality parameters of the diamonds even more visible and clear to the customers, the certificate also displays a plotted diagram of the diamond and it's internal characteristics.
|Independent Laboratories issuing diamond certificates or grading reports|
|Today, there are a select few Gem Laboratories, and these are listed below.|
Use this space to save the products you like. To add a product here, simply click the icon.