Lab-Grown Diamonds — Real Diamonds, 50-70% Less
Real diamonds, grown above ground. The same brilliance and certification as mined stones — at a fraction of the price.
Certified lab-grown from around R5,000 — WhatsApp David for today's price.
Home / Lab-Grown Diamonds
Grown, not imitation.
A lab-grown diamond is not a simulant like cubic zirconia or moissanite. It is diamond — identical carbon, identical hardness, identical fire — created by recreating the conditions under which diamonds form, in weeks rather than billions of years.
Some buyers search for lab-created diamonds, laboratory-grown diamonds or synthetic diamonds. In the certified diamond trade these terms can point to the same category: a real diamond grown in a laboratory, graded by IGI or GIA, and clearly disclosed as lab-grown on the certificate.
For many buyers that makes the choice simple: the same beauty and the same independent certification, for materially less money. A lab-grown stone lets you step up in size or quality without stepping up your budget, which is why they have become a serious option for engagement rings and made-to-order diamond jewellery alike.
We are dealers in both natural and lab-grown diamonds, so our advice is not tied to selling you one or the other. We will lay out the real trade-offs — value, resale, and personal preference — and let you choose.
Lab-grown at a glance.
Exceptional value
Expect a notably lower price than a comparable natural diamond — budget toward a larger or finer stone, or toward the setting.
Certified lab-grown diamonds
Graded on the same 4Cs scale by the IGI or GIA, with the report stating clearly that the diamond is laboratory-grown or lab-created.
Identical to the eye
No jeweller can tell a quality lab-grown diamond from a natural one by eye. The brilliance is the same; only the origin differs.
Price by certificate, size and grade.
Lab-grown diamond prices in South Africa depend on the carat weight, colour, clarity, cut, shape and whether the stone is IGI or GIA certified. Diagem sources each stone to quote, so David can price the actual certificate rather than a generic online list.
As a practical guide, certified lab-grown diamonds can start from around R5,000, with larger or higher-grade stones quoted individually. Send your budget, preferred size and shape, or an existing certificate number, and David will compare suitable options before you book a viewing.
For price-focused searches like 1ct lab grown diamond price, 2ct lab diamond cost or lab grown diamonds South Africa price, this is the fastest route: get a live quote, compare the certificate, then view the stone in Johannesburg or by Cape Town arrangement.
Weighing lab-grown vs natural?
Tell us your budget and the look you want. We'll show certified lab-grown and natural options side by side so you can decide with the facts.
Build something with it.
A certified lab-grown diamond pairs beautifully with a bespoke engagement ring or a made-to-order diamond piece designed around it. If you are comparing lab grown diamonds in South Africa, we can show lab-created, laboratory-grown and natural options side by side before you decide.
If you would like to understand the grading first, our diamond guide explains the 4Cs in plain language, and you can always compare against a natural diamond before deciding.
Lab-grown diamond rings, priced to quote.
For a lab-grown engagement ring, Diagem sources IGI-certified lab-grown diamonds and designs the setting around the stone. David can show how the carat weight, colour, clarity and cut affect the price, then compare lab-grown and natural options side by side.
Use this route if you are searching for lab grown diamond ring Johannesburg, lab grown diamonds South Africa, lab diamond ring price SA or lab grown engagement ring South Africa. Viewings are by appointment in Johannesburg, with Cape Town appointments by arrangement and insured delivery nationwide.
First-Time Diamond Buyer? Here’s Exactly How It Works.
Call David — he’ll walk you through everything in plain language. No jargon, no pressure, no obligation.
Call David
Call David — or WhatsApp. A real person answers. No robots, no call centres, no waiting on hold.
No-Obligation Chat
David explains everything in plain language. No pressure, no sales pitch — just honest advice from 25+ years in the diamond trade.
View the Diamonds
By appointment at our Johannesburg offices. We can also arrange to meet you in Cape Town.
Design & Approve
For bespoke jewellery, David consults with you at every stage. You receive photos throughout — nothing is a surprise.
Delivered to Your Door
Fully insured courier anywhere in South Africa. No need to travel — we bring the diamond to you.
“Anywhere in South Africa. Real diamonds. Real people. Real simple.”
Where to view
See lab-grown diamonds in person.
View certified lab-grown diamonds by appointment in Johannesburg, with Cape Town viewings by arrangement — and insured delivery nationwide once you've chosen. Diagem holds physical stock, so you can compare real lab-grown and natural diamonds side by side instead of choosing from catalogue photos alone.
With over 25 years in the South African diamond trade, we leave no stone unturned to find exactly what you're looking for. Every enquiry is handled personally by David — no chatbots, no automated responses. Real expertise. Real service.
📞 Call DavidLet’s talk →
Frequently asked questions
Are lab-grown diamonds real diamonds?
Are lab-grown diamonds certified?
Why are lab-grown diamonds cheaper?
Will a lab-grown diamond test as a diamond?
We Beat Lab-Grown Quotes Too
As diamond polishers and cutters at the top of the supply chain, we can source and supply lab-grown diamonds at prices that are hard to beat. Same grade, same certification, better price.
Send us any competitor’s quote with the IGI or GIA certificate details and we’ll show you what we can do. Any comparison is based on the same certificate details, current availability and like-for-like grading.
Send Your Quote →Let's find your diamond.
Speak to a dealer, not a salesperson. Get an honest quote with no obligation.