What clarity characteristic must always be disclosed on a grade report and to a buyer when selling a diamond with this characteristic?

• A. The presence of laser drilling.
• B. The presence of fluorescence.
• C. The presence of irradiation treatment.
• D. The presence of laser cutting marks.

Answer: (A)

The key idea is transparency about treatments that affect how the diamond looks or its value. Laser drilling is a clarity-related treatment that is used to reduce or remove dark inclusions by making tiny tunnels with a laser. Because this alters the stone’s internal features and can influence both value and buyer perception, it must be disclosed on the grading report and to anyone buying the diamond. The report will note that laser drilling has been performed, so buyers are clearly informed before purchase. Fluorescence, irradiation, and laser cutting marks are different types of characteristics or marks and are not required in the same way as laser drilling to be disclosed as a clarity treatment on both the report and to the buyer, even though they may appear on reports or under magnification.