What is ISO 24016?

ISO 24016 is officially titled:

โ€œJewellery โ€” Natural diamonds โ€” Terminology, classification and nomenclatureโ€

This standard provides a comprehensive, standardized system for the grading and description of single unmounted polished natural diamonds. It covers:

  1. ๐Ÿ’Ž The 4Cs: Cut, Clarity, Carat weight, and Colour
  2. ๐Ÿ”ฌ Grading procedures using scientific instruments and expert assessment
  3. ๐Ÿ“‹ Terminology and definitions used in diamond classification
  4. โŒ Exclusion of synthetic and treated diamonds (natural only)

ISO 24016 aligns with grading systems used by major gemological institutes (e.g., GIA, IGI, HRD) but provides an internationally recognized, vendor-neutral standard for the entire industry.

Why is ISO 24016 important?

The diamond industry faces growing scrutiny from:

  1. ๐Ÿ’ก Consumers demanding transparency and traceability
  2. ๐Ÿ›ƒ Customs and trade bodies monitoring for compliance and ethical sourcing
  3. ๐ŸŒ International markets requiring harmonized terminology

ISO 24016 ensures consistency in grading, reduces disputes, and improves market trust. Itโ€™s especially important for:

  1. Gemstone laboratories
  2. Jewelry brands
  3. Wholesalers and exporters
  4. Online diamond retailers
  5. Appraisers and insurers


What are the benefits of ISO 24016?

Adopting ISO 24016 provides clarity and competitive edge in the diamond trade:

  1. โœ… Standardized Diamond Grading

          Grading reports follow a consistent structure, ensuring clarity across markets.

  1. ๐Ÿ” Enhanced Consumer Confidence

           Buyers receive accurate, traceable, and internationally validated grading data.

  1. ๐Ÿ“Š Alignment with Global Trade Practices

           Reduces risk of rejection, return, or devaluation across international borders.

  1. ๐Ÿงพ Support for Legal and Insurance Documentation

           Compliant with legal frameworks for valuation, certification, and customs clearance.

  1. ๐ŸŒฑ Promotes Ethical Sourcing

           Helps separate natural diamonds from synthetics and treated stones.


What kind of businesses can benefit from ISO 24016?

With GMCโ€™s ISO 24016 consulting, your business gains tangible value:

  1. โœ… Improve Grading Consistency Across Labs

          Minimize customer complaints and inter-lab discrepancies.

  1. โœ… Expand into Global Diamond Markets

          Comply with international grading requirements used in the U.S., Europe, Asia, and GCC countries.

  1. โœ… Increase Trust and Brand Credibility

           ISO-based reports signal professionalism and integrity to clients and investors.

  1. โœ… Reduce Legal and Insurance Risks

          Ensure your reports are accepted by courts, customs, and insurers globally.

  1. โœ… Build Operational Efficiency

          Standardize grading workflows, employee training, and documentation formats.


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