This can be easily remedied by following our guidelines on ideal proportions for each shape diamonds.
The Professional Gem Science Laboratory (PGS) is also a dependable lab, but doesn’t have a significant market share.
Moreover, GCAL is also a very refutable lab, but have a small market share.
The only factor you have to lookout for is the cut in GIA reports.
In round cuts, they offer a cut grade, but they do not in other shapes.
On the other hand, the European Gemological Laboratory (EGL) has lost much of its credibility and market share.
The Gemological Science International (GSI) is an okay lab and would sometimes have one to two grades inconsistency.
The diamond grading institute said on April 05, 2019, that it would not use the term while referring to the stones made in a laboratory, either in the title or its reports.
It will keep using descriptive terms of clarity and color for lab-made diamonds, suggesting the variety of grading that is referred to in the GIA grading report.
The new lab-diamond reports of GIA will be available starting from July 01, 2019.
The Institute also noted that customers who have bought synthetic-diamond report from it before that day can have the report exchanged for the new one for free.