With the increasing popularity of lab-grown diamonds, many buyers are asking a simple but important question: How can I be sure of what I’m buying?
At Prins & Prins, we believe that transparency and education are just as valuable as the gemstones we sell. The video above, from The Diamond Learning Centre, offers clear guidance on how to distinguish between natural and laboratory-grown diamonds—and why this matters when making a meaningful purchase.
By law, it is illegal to sell a lab-grown diamond without disclosing that it is synthetic.
In fact, the term “diamond” on its own refers exclusively to a natural diamond.
“Lab-grown diamonds must be clearly qualified,” explains the expert in the video. “You’ll see terms like laboratory-grown, man-made, or manufacturer-created diamond. Retailers cannot legally use the word ‘diamond’ by itself to describe synthetic stones.”
This is crucial for protecting consumers and ensuring fair trade in the jewellery industry.
When shopping for a diamond—especially one of significant size—always request a grading certificate. These documents, issued by trusted gem labs such as GIA, IGI, or HRD, confirm the diamond’s:
Cut, clarity, colour, and carat weight
Whether it is natural or lab-grown
“Every certified diamond must disclose if it is a laboratory-grown stone,” says our gemmologist. “This is your assurance of authenticity.”
At Prins & Prins, every certified diamond we sell comes with complete documentation for your peace of mind.
Whether you’re buying an engagement ring, a pendant, or an investment piece, here’s how to protect yourself:
Ask the question: Is this diamond natural or lab-grown?
Look at the terminology: The word “diamond” should only be used alone for natural stones.
Check the certificate: It should clearly indicate the stone’s origin.
Choose a reputable jeweller: Work with professionals who are transparent and ethical.
While lab-grown diamonds are physically and chemically similar to natural ones, they do not carry the same rarity, symbolism, or long-term value.
At Prins & Prins, we respect both choices—natural and lab-grown—but we believe our clients deserve to understand the difference in origin, value, and longevity before making such a significant purchase.
Still have questions about what type of diamond suits your budget and beliefs? Let us help. Our team of qualified gemmologists is here to guide you—whether you’re purchasing your first diamond or adding to a legacy collection.
Visit our showroom in Cape Town or contact us to book a personal consultation.
Prins & Prins – Integrity, Excellence, and 40 Years of Trusted Craftsmanship