Security Seal - World Gemological Institute
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Security Seal


The security seal used by the World Gemological Institute (WGI) is a tamper-evident feature designed to ensure the authenticity and integrity of the issued reports. It serves as a visual indication that the report has not been altered or tampered with since its issuance by WGI. The purpose of a security seal is to provide reassurance to buyers, sellers, and other stakeholders in the diamond and gemstone industry that the stone has been handled and transported securely, reducing the risk of theft, fraud, or unauthorized alterations. By using security seals, the diamond industry aims to maintain transparency, traceability, and trust throughout the supply chain.



The security seal typically consists of the following elements:


  1. Holographic Features: The security seal may incorporate holographic elements, such as a hologram or holographic foil, which are difficult to replicate. These features can display intricate patterns, colors, and visual effects that provide a unique and identifiable appearance.
  2. WGI Logo or Emblem: The security seal often includes the official logo or emblem of the World Gemological Institute, which signifies the authority and credibility of the institute.
  3. Unique Serial Number: Each security seal is assigned a unique serial number that is typically printed or engraved on the seal. This number serves as a reference and can be cross-checked with WGI’s records to ensure the authenticity of the report.
  4. Void or Tamper-Evident Patterns: The security seal may incorporate patterns or text that reveal evidence of tampering when the seal is peeled off or removed. This feature helps to protect against unauthorized opening or alteration of the report.
  5. Adhesive Backing: The security seal is designed with a strong adhesive backing that securely attaches it to the report. Attempts to remove or reposition the seal will cause visible damage or leave residue, indicating tampering.
  6. Holographic or UV Ink Printing: Some security seals may use special inks that are only visible under certain lighting conditions, such as ultraviolet (UV) light. These hidden elements provide an additional layer of security and help to authenticate the seal.







The specific design and characteristics of the security seal used by WGI may vary over time to incorporate the latest anti-counterfeiting technologies. The purpose of the seal is to provide confidence and assurance to the recipient that the report is genuine, unaltered, and issued by the WGI.