Lab-grown diamonds have been growing in popularity worldwide—and South Africa is no exception. With their ethical appeal, technological origin, and increasing availability, these gems have carved a significant space in the jewellery market. But with innovation comes the need for clarity and regulation. That’s why the Jewellery Council of South Africa (JCSA) has released a comprehensive guide outlining recommended practices to ensure transparency, consumer protection, and industry integrity.
Here’s a breakdown of what you need to know:
What Is a Lab-Grown Diamond?
Lab-grown diamonds—also known as laboratory-created, man-made, or lab-created diamonds—are real diamonds made in controlled environments using either High-Pressure High Temperature (HPHT) or Chemical Vapor Deposition (CVD) technology. They possess the same physical, chemical, and optical properties as natural diamonds, but they’re created above ground rather than beneath it.
While these diamonds are chemically identical to their mined counterparts, international guidelines (such as ISO 18323 and the CIBJO Diamond Blue Book) still reserve the word “diamond” alone for those formed by nature.
Why These Guidelines Matter
The JCSA’s recommended practices serve two primary purposes:
- Protecting consumer confidence: Buyers should know exactly what they’re purchasing—and what they’re not.
- Safeguarding the jewellery industry: Clear differentiation between lab-grown and natural diamonds prevents confusion and fraud, ultimately maintaining trust across the board.
Key Recommendations for Retailers and Suppliers
1. Clear Terminology Is Essential
Only specific descriptors should be used, such as “lab-grown diamond” or “laboratory-created diamond.” Terms like “synthetic diamond” or “counterfeit diamond” are misleading and should be avoided.
2. Mandatory Disclosure
Full disclosure isn’t just ethical—it’s legal. Sellers must explicitly state whether a diamond is lab-grown in all marketing, sales documents, and verbal communication. Non-disclosure constitutes fraud and violates the Consumer Protection Act.
3. No Mixing of Diamonds
Companies dealing in both natural and lab-grown diamonds must have strict processes to prevent cross-contamination. Stones should be separated, labelled clearly, and tested where necessary.
Smart Pro Optimum Diamond Multi-Tester
SmartPro MAX Diamond Multi-Tester
4. Labelling and Hallmarking
Where possible, jewellery set with lab-grown diamonds should be stamped “LGD” and accompanied by appropriate documentation. For stones above 0.20cts, a grading report is recommended.
5. Valuation and Pricing
As lab-grown diamond pricing is still evolving, replacement valuations should reflect current retail pricing. Clarity in valuations—stating whether the stone is natural or lab-grown—is non-negotiable.
6. Technology, Detection & Tracking
Advanced tech, such as blockchain tracking and nanoparticle tracing, is encouraged to boost transparency and traceability across the supply chain. Jewellers are urged to use detection tools and testing labs when in doubt.
Smart Pro Optimum Diamond Multi-Tester
SmartPro MAX Diamond Multi-Tester
Consequences of Non-Disclosure
The Jewellery Council takes misrepresentation seriously. Non-disclosure of lab-grown diamonds may lead to:
- Expulsion from the JCSA
- Public naming and shaming
- Legal action, including possible criminal charges
- Reporting to international bodies such as the WFDB and CIBJO
A proposal is also underway to establish a Jewellery Integrity Commission, which will serve as an official body to mediate, investigate, and act on reports of non-disclosure and other unethical practices.
Final Thoughts
Lab-grown diamonds are here to stay, offering exciting opportunities for both jewellers and consumers. But with that innovation comes responsibility. Whether you’re a buyer, a retailer, or a manufacturer, transparency is the cornerstone of trust in the jewellery industry.
By following the JCSA’s guidelines, the South African diamond sector can confidently embrace this new era—one that balances modern technology with ethical standards and honest practices.
For more, click here to view the Guidelines & Recommended Trade Practices Relating to Laboratory-grown Diamonds set by the Jewellery Council of South Africa.
For more information or to report a concern, contact:
The Jewellery Council of South Africa
📧 Email: lornal@jewellery.org.za
📞 Tel: 011 484 5528