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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Reach Diagem.
WhatsApp is fastest, but a call or the enquiry form below work just as well. However you reach out, you deal with David directly β not a call centre.
By appointment only
Knox Safes, 1 River Street, Houghton Estate, Johannesburg, 2196
Office: 011 334 0187
Get directions β
Frequently asked questions
How quickly will you reply?
Can I visit in person?
Which areas do you serve?
Do you buy diamonds as well as sell?
You're speaking to a person, not a system.
We've been in the diamond trade for over 25 years, and every single enquiry is still handled personally by David. No chatbots. No automated responses. No "we'll get back to you in 3-5 business days."
Whatever you're looking for β a certified loose diamond, a bespoke engagement ring, or simply some honest advice β we leave no stone unturned to help you find it. It all starts with a conversation.
π 082 551 2103Call or WhatsApp β real person, real answers
Not sure what you need? David will help. Call or WhatsApp β no obligation, no jargon, just honest advice from someone whoβs been in the diamond trade for 25+ years.
Tell us what you're looking for.
Fill in the form and David will reply personally. Prefer to talk now? Use the WhatsApp or call buttons β we're happy to help.
π¬ Chat with David on WhatsApp
Get an instant response from David, our diamond specialist. Most clients get a reply within minutes.
Start WhatsApp Chatπ± +27 82 551 2103 Β |Β MonβSat 9amβ6pm
β or β
Prefer email? Fill in the form below
Industry credentials you can verify
Certified Diamonds
Every diamond we supply is independently graded by the GIA or IGI β the worldβs leading gemological laboratories. Certification documents cut, colour, clarity and carat weight so quality is verifiable, not just claimed.
Diamond Dealers Club of South Africa
The official, internationally recognized trade association and networking hub for South Africaβs diamond manufacturers, dealers, and jewellers. It protects industry ethics, settles trade disputes, and gives members access to the global diamond market.
diamonds.org.za βWorld Federation of Diamond Bourses
Membership of the WFDB β the global network connecting diamond exchanges and trade associations across more than 30 countries β means Diagem operates within an internationally recognised framework of ethical standards and market access.
wfdb.com/about βLet's find your diamond.
Speak to a dealer, not a salesperson. Get an honest quote with no obligation.