Laboratory Reports

A diamond grading report from an independent gemological laboratory is the opinion of an expert not a warranty or guarantee. Although most of our diamonds have been graded by the American Gem Society or the GIA we also verify all of the diamond grading information in our own on-site diamond grading laboratory. During this process we pay special attention to the quality of the cut which is not always completely disclosed on independent laboratory reports. We guarantee the quality of every diamond we sell in a document called the Pieter Andries Diamond Grading Certificate.