How quickly will you reply?

Usually the same day. WhatsApp is the fastest way to reach us; enquiries sent through the form are answered personally by David.

Can I visit in person?

Diagem is based in Johannesburg and meetings are by appointment. Message us to arrange a convenient time to view stones or discuss a commission.

Which areas do you serve?

We are based in Johannesburg and serve clients across South Africa, with insured, secure nationwide delivery of diamonds and finished jewellery.

Do you buy diamonds as well as sell?

Yes. If you'd like to sell a diamond or a piece of jewellery, send photos and details through the form or on WhatsApp for a discreet valuation.

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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💎 DDCSA Member 🌐 WFDB Member 🔬 GIA Certified

Home / Contact

Three easy ways

Get in touch with David

However you reach out, you deal with David directly — not a call centre.

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Fastest response — David usually replies within minutes.

Chat on WhatsApp

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Phone

Speak to David directly for an immediate conversation.

Call David

Mon–Fri 9am–5pm | Sat–Sun: WhatsApp only

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Email Enquiry

Fill in the form below and David will reply personally.

Send Enquiry

Reply within 24 hours

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 →

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World Federation of Diamond Bourses

Member of the WFDB — the global authority representing diamond bourses and dealers in over 30 countries worldwide.

wfdb.com →

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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."

Google reviews

Had a good experience with Diagem?

If David helped you find the right diamond or piece of jewellery, a short Google review helps other clients choose Diagem with confidence.

Leave a Google review

Send an enquiry

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 — we're happy to help.

Call David — WhatsApp Call David

💬 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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Ready when you are

Let's find your diamond.

Speak to a dealer, not a salesperson. Get an honest quote with no obligation.

Message on WhatsApp Request a quote