As we have posted about before, diamond grading is not a consistent, foolproof industry. In particular many jewelers complain that EGL International certs are often embellished, therefore changing the value of certain diamonds.
Mid-America Jewelry News examined the issue.
Here are a few points:
Honesty is the best policy. When dealing with clarity-enhanced or drilled stones, jewelers must be up front with the customer. Tell the customer that EGL International uses a different standard of grading than GIA.
Different is not always bad. EGL invented the SI3 as there were too many diamonds that were falling between SI2 and I1. Also, AGS invented the cut grade.
Competition is good. If there was only one lab, they could raise prices and essentially charge any price they want for certifications. Appreciate the diversity multiple labs contribute.
Diamond grading is subjective. There are traits of a diamond that are objective, like depth, and there are traits in diamond grading that are subjective, like color and clarity. Clarity is complicated. With no master set for clarity, you must look at the total volume of the stone and the location of the inclusions. All labs seem to have different scales for the scientific basis for clarity. There will always be a gray area.
Instead of putting down one laboratory, explain to your customers that there are different standards. Encourage your customers to compare the stones on their own and decide which they prefer most.
Read the full article here.