Laser drilling targets what feature within a diamond?

• A. Surface blemishes only.
• B. Carat weight.
• C. Color zoning on the table.
• D. Dark inclusions.

Answer: (D)

Laser drilling is used to reach and treat internal dark flaws. Those dark inclusions are the parts of the diamond that most noticeably ruin clarity, so a laser is guided from the surface toward the inclusion to access it. The goal is to bleach or dissolve the inclusion, making it less visible and improving the diamond’s apparent clarity and grade. This is not about surface blemishes, carat weight, or color zoning on the table, which are unrelated to this internal process. If present, laser drill markings can be seen under magnification, signaling that the diamond has undergone this treatment.