“Absolutely amazing experience dealing with David and his team. Short notice and he pulled it off. No hassle and no BS”
Get in touch
Let's talk diamonds.
The fastest way to reach us is WhatsApp. Message David directly and you'll usually have a reply the same day.
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Three easy ways
Get in touch with David
However you reach out, you deal with David directly — not a call centre.
Visit us
By appointment in Johannesburg
Knox Safes, 1 River Street, Houghton Estate, Johannesburg 2196
Get directions →
Industry Credentials
Diagem is a verified member of the DDCSA and WFDB — bodies that regulate local and international diamond dealers. Only established, ethical dealers are admitted.
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Diamond Dealers Club of South Africa
Full member of the DDCSA — South Africa's leading body regulating diamond dealers. Membership requires proven ethical standing.
diamonds.org.za →🌐
World Federation of Diamond Bourses
Member of the WFDB — the global authority representing diamond bourses and dealers in over 30 countries worldwide.
wfdb.com →🔬
Certified Diamonds
Diagem supplies GIA-certified natural diamonds and IGI-certified lab-grown diamonds, with certificate details explained before you choose.
View certified diamonds →"We don't just say we're trustworthy — we're certified by the organisations that define what trust means in the diamond industry."
Google reviews
Leave a Google review
Had a good experience with Diagem?
If David helped you find the right diamond or made-to-order diamond jewellery piece, a short Google review helps other clients choose Diagem with confidence.
Verified Google reviews
What Our Clients Say
Recent public Google reviews for Diagem Diamonds. These reviews do not claim to be about this specific page unless the reviewer says so.
“Absolutely exceptional service. From first contact till delivery David went above and beyond to assist in creating something beautiful. Really recommend!”
“David's assistance and immediate knowledgeable responses are something to behold.”
Reviews sourced from Diagem Diamonds’ verified Google Business Profile. View Diagem reviews on Google Leave a Google review
Send an enquiry
Tell us what you're looking for.
Fill in the form and David will reply personally. Prefer a quick reply? Use WhatsApp or the enquiry form — we're happy to help.
💬 Chat with David on WhatsApp
Get an instant response from David, our diamond specialist. Most clients get a reply within minutes.
Start WhatsApp Chat📱 Mon–Fri 9am–5pm | Sat–Sun: WhatsApp only
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Let's find your diamond.
Speak to a dealer, not a salesperson. Get an honest quote with no obligation.
Visiting South Africa to buy diamonds?
International visitors can plan a Johannesburg diamond viewing or Cape Town appointment by prior arrangement with David before or during their trip.
Read the tourist diamond buying guide