• 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

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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.

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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

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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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