Diamond Laser Inscription: A Small Detail That Matters

By Mr. Mello, founder of LAMOR&CO

A customer may ask about a diamond’s carat weight, color, or clarity. Far fewer ask where its laser inscription will sit after the stone is set.

That small detail deserves attention.

The number on the diamond should match its report

A diamond’s laser inscription is a microscopic marking on its girdle—the narrow edge around the stone.

When that inscription identifies an IGI grading report, its report number should match the number on the document. Comparing them is an important identification step, alongside checking the diamond’s characteristics and verifying the report through IGI.

A matching number is useful. It should not replace a professional examination.

Cover illustration: LG758510634 appears on both the illustrated diamond and report. This is an educational illustration, not a photograph of a verified diamond or an authenticated report. The corresponding official IGI report is available for reference.

Why the inscription’s position matters

Before setting a diamond, I locate its inscription. When the stone and mounting allow it, I position the diamond so the marking remains accessible from the side, between the prongs.

A prong placed over the inscription can make future reading difficult or impossible without additional bench work.

Some designs necessarily limit visibility. But when the inscription could have remained accessible and nobody considered its position, an important detail has been overlooked.

Selling jewelry and setting diamonds require different experience

Being a jewelry store owner or manager does not, by itself, establish experience at the bench. Sales knowledge and hands-on diamond-setting experience are different skills.

My career includes 27 years of professional diamond setting. My work in New York includes assignments carried out through subcontracting workshops for pieces destined for Tiffany & Co.

At LAMOR&CO, that experience informs both my guidance and my personal microscope inspection of every finished piece before shipment.

What should you ask your jeweler?

Does my diamond have a report-number inscription?

Ask what is inscribed and how it corresponds to the accompanying report.

Will it remain readable after setting?

That depends on the diamond and mounting. The decision should be considered before setting begins.

Does a hidden inscription mean poor workmanship?

Not necessarily. The distinction is whether coverage was unavoidable or an accessible position was overlooked.

Small details reveal the thought behind the work.

Contact LAMOR&CO to discuss your diamond, its documentation, and the setting you have in mind, or explore our lab-grown diamond engagement rings.

From the bench… directly to you.

Source: IGI Laserscribe®: diamond laser inscriptions and report-number identification.