“Still using the old sticker plots for your valuations? Then you're stuck behind the times. Jewellers who use plotting diagrams to note inclusions during take-in procedures or valuations commonly use rubber stamps, stick-on diagrams, or preprinted forms.

None of these methods provides you with all the common diamond-cutting styles, so jewellers end up modifying the diagram by hand or writing complicated descriptions of the diamond.

If you wonder whether it really works, consider this. The American Gem Society Laboratory uses Perfect Diagram for its diamond-grading reports.”

Gary Roskin,
Jewelers Circular Keystone Magazine, USA