• GIA & IGI Certified

    Every stone independently verified

  • 25+ Years in Diamonds

    Established South African dealer

  • Factory-Direct Pricing

    No retail markup, ever

  • Insured Delivery

    5-10 days, tracked & secure
Close-up of a brilliant cut diamond - hand-selected certified diamonds from Diagem

Brilliance You Can See

Each diamond in our collection is hand-selected for its fire, clarity, and presence. We don't just sell diamonds - we curate them.

Explore Natural Diamonds

Find Your Diamond

How to Buy a Diamond

Five simple steps from browsing to unboxing

1

Browse & Filter

Search by shape, carat, clarity, colour, and budget

2

Select Your Diamond

Choose a GIA or IGI certified stone that fits your needs

3

Chat With Us

WhatsApp or call our experts for personalised guidance

4

Secure Payment

Pay safely online - your purchase is protected

5

Insured Delivery

5-10 days, tracked, with your certificate included

Why Diagem

Buying a diamond should feel exciting - not overwhelming. At Diagem, we combine 25 years of industry expertise with a modern online experience to help you choose with absolute confidence.

As members of the Diamond Dealers Club of South Africa and the World Federation of Diamond Bourses, every stone we offer is certified, ethically sourced, and priced without retail markup.

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Trusted & Accredited

DDC SA Member

Diamond Dealers Club
of South Africa

WFDB Affiliated

World Federation of
Diamond Bourses

GIA Certified

Gemological Institute
of America

IGI Certified

International Gemological
Institute

Insured Delivery

Tracked & secure
nationwide shipping

25+ Years Trusted

Established South African
diamond dealer

From Our Blog

View all articles

  • Lab-Grown Diamonds: The Future of Ethical Brill...

    In recent years, lab-grown diamonds have emerged as a revolutionary alternative to their natural counterparts, offering identical chemical, physical, and optical properties, but with a distinct and compelling origin story....

    Lab-Grown Diamonds: The Future of Ethical Brill...

    In recent years, lab-grown diamonds have emerged as a revolutionary alternative to their natural counterparts, offering identical chemical, physical, and optical properties, but with a distinct and compelling origin story....

  • The Timeless Allure of Natural Diamonds: A Lega...

    For centuries, natural diamonds have captivated hearts and symbolized everlasting love, commitment, and celebration. Formed billions of years ago under immense pressure and heat deep within the Earth's mantle, these...

    The Timeless Allure of Natural Diamonds: A Lega...

    For centuries, natural diamonds have captivated hearts and symbolized everlasting love, commitment, and celebration. Formed billions of years ago under immense pressure and heat deep within the Earth's mantle, these...

  • Stunning lab-grown emerald diamond - South Africa buyer guide 2025

    Lab-Grown Diamonds in South Africa: Your Comple...

    The diamond landscape in South Africa is evolving rapidly. Lab-grown diamonds—once a niche curiosity—have become a mainstream choice for savvy buyers seeking brilliance without compromise. But what exactly are these...

    Lab-Grown Diamonds in South Africa: Your Comple...

    The diamond landscape in South Africa is evolving rapidly. Lab-grown diamonds—once a niche curiosity—have become a mainstream choice for savvy buyers seeking brilliance without compromise. But what exactly are these...

  • Beautiful natural diamond - South Africa diamond investment 2025

    Why Natural Diamonds Remain South Africa's Most...

    South Africa's relationship with natural diamonds runs deeper than commerce—it's woven into our national identity. As the birthplace of modern diamond mining, our country has shaped the global jewellery landscape...

    Why Natural Diamonds Remain South Africa's Most...

    South Africa's relationship with natural diamonds runs deeper than commerce—it's woven into our national identity. As the birthplace of modern diamond mining, our country has shaped the global jewellery landscape...

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Diamond Knowledge

Questions & Answers

Are your diamonds certified?

Yes. Every diamond we sell comes with independent GIA or IGI certification — the global gold standard for verifying cut, colour, clarity, and carat weight. No diamond leaves our collection without a grading report from one of these internationally recognised labs.

Why are your prices lower than high-street jewellers?

We're a direct dealer, not a retail jeweller. You're buying from the source — no middleman markup, no flagship store overheads. Whether natural or lab-grown, we pass the savings directly to you.

How does delivery and insurance work?

All orders ship fully insured with overnight Courier Rob or PostNet to PostNet within South Africa. Your diamond arrives securely packaged with its certification document. We ship nationally and internationally — rates and lead times vary by destination.

What is your returns policy?

We offer a 10-day inspection period. If you're not completely satisfied, return the diamond in its original condition with all documentation for a full refund. See our Returns Policy page for full terms.

Your Diamond Is Waiting.

Browse certified diamonds from a name you can trust.

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