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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Get in touch with David
However you reach out, you deal with David directly — not a call centre.
By appointment in Johannesburg
Knox Safes, 1 River Street, Houghton Estate, Johannesburg 2196
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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.
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 →GIA & IGI Certified
Every diamond we supply is independently graded by the GIA or IGI — the world's most trusted gemological laboratories.
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."
Tell us what you're looking for.
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💬 Chat with David on WhatsApp
Get an instant response from David, our diamond specialist. Most clients get a reply within minutes.
Start WhatsApp Chat📱 +27 82 551 2103 | Mon–Sat 9am–6pm
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Let's find your diamond.
Speak to a dealer, not a salesperson. Get an honest quote with no obligation.