A diamond certificate, also known as a diamond report, is issued by an accredited independent gemological laboratory. In addition to the diamond’s carat weight and measurements, a “certificate” (grading report) includes grades for the diamond’s cut, colour and clarity. These grades are the opinion of the individual at the lab who graded the diamond, based on the lab’s own subjective grading standards.
Here at SwissTimepieces.co.uk we only use the industry leading gemological laboratory to grade our diamonds, known as the GIA (Gemological Institute of America).
Established in 1931, the Gemological Institute of America, or GIA, is the world authority on diamonds and other gems. A non-profit organisation, the GIA upholds the highest standards recognised by the diamond industry. In 1953 the GIA developed the well known 4C’s and established their diamond and gemstone grading system, which today, is a worldwide standard. The GIA grading report is considered the benchmark to which all others are compared.
A GIA diamond grading report gives you all the important information you need to know about a diamond’s 4Cs, as well as its fluorescence, any treatments and more. With a GIA diamond grading report you can be sure that your diamond is a natural diamond. That’s because GIA has examined and tested the diamond using the most sophisticated instruments and procedures available, informed by the Institute’s ongoing scientific research.
Since a GIA diamond grading report is an unbiased assessment of a stone’s quality characteristics, it lets you compare one GIA-graded diamond to another. This empowers you to compare the quality of loose diamonds, and decide which one is the best value and right for you.
Making sure the diamond you’re eyeing comes with a GIA diamond grading report is like getting an independent inspection before you buy a car or house. It’s a smart step in your purchase process – and many insurance companies will require a GIA grading report as a basis for insuring your diamond.