A diamond certificate is the official "finger print" of a diamond graded by an accredited gemological laboratory. These reports are the most accurate way to determine the quality of a diamond.
The purpose of a diamond certificate is to analyze and put down in writing the specific characteristics of a diamond. These include but are not limited to: dimensions, carat weight, clarity and color, cut grade and inclusions.
Only loose diamonds, meaning those not yet set or removed from the setting, are able to be certified by GIA. To ensure objectivity, diamonds are graded by multiple experts separately, and free of any identification that could skew their opinion. It is unusual to see diamond under .50 carat submitted for grading due to the time-intensive and expensive nature of this process.
Diamonds graded by the same agency can be compared on identical standards and measurements. This fair scale is the best way to determine a diamond's market value, especially since small variations in quality can translate into huge monetary differences.
Wonder Jewelers offers diamonds with certificates from one of the following independent accredited laboratories:
These are the 3 most well respected labs and vary slightly in grading standards. In general, AGS and GIA are considered to be the most conservative than the EGL. So, a diamond with a GIA or AGS certificate will usually cost a few percent more than a similar EGL certified diamond.
Here at Wonder Jewelers, we strongly believe in a policy of 100% transparency. We will always be honest about a diamond's certificate and are experts at navigating their minute differences to get you the best value.
This sample certificate is from GIA:
A Certificate lists the physical characteristics of a diamond that will determine its market value. It does not purport to provide the actual monetary value. An appraisal uses a certificate to provide as accurate a market value for the diamond as possible.