In the diamond trade, we often speak of a laser inscription as if it is an unbreakable bond between a diamond and its grading certificate. However, anyone with real-world experience whether on the manufacturing floor or in the secondary market knows the truth: inscriptions can be removed, altered, or forged.
Polish the girdle and the inscription disappears. Re-cut the stone and it’s gone entirely. Worse still, an inscription can be duplicated onto a different diamond to mimic an existing report number. This is not speculation; it has happened, and more often than many in the trade care to admit.
Another serious vulnerability occurs after grading. Once a diamond is set into jewellery, nothing prevents a switch from taking place during setting, repair, or even in transit. This risk is not confined to smaller stones high-value diamonds have been switched in exactly this way.
Verification presents its own challenges. Even if the diamond is the original stone graded by the laboratory, the inscription is frequently obscured by the jewellery setting. Accessing it often requires removing the stone a delicate procedure that carries risk to both the stone and the setting. Most grading laboratories, including DCLA, will not remove diamonds from their mountings, and many jewellers are reluctant to attempt it due to the potential for irreversible damage.
Digital records, blockchain entries, and grading reports track the details, but they do not track the actual physical stone. If the diamond is switched but the paperwork remains unchanged, the system still appears to validate it as authentic. This is precisely how sophisticated fraud can go undetected.
Until the industry bridges the gap between the physical diamond and its digital record, laser inscriptions will remain a weak link in the chain of security.
At DCLA, we believe the next step in true physical traceability lies in combining advanced identification technology with secure, tamper-proof verification processes ensuring that a diamond’s identity is as enduring as the stone itself.