What Is Diamond Laser Inscription and Why Does It Matter?
You scan the QR code on the certificate. The report opens instantly. Everything looks genuine. But here’s the real question: How do you know the diamond in your hand actually matches that certificate? A certificate alone does not prove the stone and report belong together. In fact, there have been multiple cases globally where genuine reports were paired with different diamonds. The solution is something most customers never notice at first glance: Diamond laser inscription. What Is a Diamond Laser Inscription? A diamond laser inscription is a microscopic identification number etched onto the diamond’s girdle using laser technology. The inscription is extremely small and usually invisible to the naked eye. It can typically only be viewed using 10x magnification through a jeweller’s loupe or microscope. This number usually matches the report number printed on the diamond certificate. The inscription acts like the diamond’s fingerprint. Where to Find the Inscription on Your Diamond Step 1: Ask for a 10x Loupe. Step 2: Look at the girdle — the thin outer edge of the diamond. Step 3: Match the inscription number with the certificate. Why Inscription Matters More Than the QR Code A QR code only verifies that the certificate exists. The inscription verifies that the actual diamond matches that certificate. At IDT, we have encountered situations where the QR code and certificate were genuine, but the stone itself had been swapped. Gold has a BIS hallmark. Diamonds have laser inscription. Can All Diamonds Be Laser Inscribed? 1. Only Loose Diamonds Are Inscribed Laser inscription is generally performed on loose diamonds handled directly inside the laboratory. 2. Mounted Jewellery Usually Cannot Be Inscribed When a diamond is already set in jewellery, accessing the girdle safely becomes difficult. 3. Very Small Diamonds May Not Be Suitable Diamonds below approximately 0.18 carats often do not receive inscriptions. Can You Engrave Custom Words or Initials on a Diamond? Yes. In many cases, laser inscription can also be used to engrave custom text on a diamond. Some customers choose to inscribe initials, important dates, short names, or meaningful words and messages. Custom inscription is especially popular for engagement diamonds, anniversary gifts, heirloom stones, and sentimental jewellery. How to Verify Your IDT Diamond Inscription Free Step 1: Scan the QR code printed on your IDT certificate. Step 2: Visit https://www.idtworldwide.com/verify Step 3: Enter the inscription number and compare the details. Final Thoughts A diamond certificate is important. But the inscription is what connects the certificate to the actual stone. That tiny microscopic number plays a major role in preventing stone swaps and improving transparency. Before buying a certified diamond, always ask one simple question: “Can I see the inscription?” FAQs What is laser inscription on a diamond? It is a microscopic report number etched onto the diamond’s girdle that links the stone to its grading certificate. Can I see diamond inscription without a loupe? No. In most cases, you need at least 10x magnification to view the inscription clearly. Do all IDT certificates include inscription? No. Laser inscription is generally available only for loose diamonds graded inside the laboratory.
