A brilliant lab-grown diamond held to the light
Modern & certified

Lab-Grown Diamonds β€” Real Diamonds, 50-70% Less

Real diamonds, grown above ground. The same brilliance and certification as mined stones β€” at a fraction of the price.

IGI certified lab grown emerald cut diamond 0.72ct Diagem Diamonds

Home Β /Β  Lab-Grown Diamonds

The honest explanation

Grown, not imitation.


A lab-grown diamond is not a simulant like cubic zirconia or moissanite. It is diamond β€” identical carbon, identical hardness, identical fire β€” created by recreating the conditions under which diamonds form, in weeks rather than billions of years.

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 everyday fine 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 β€” value, resale, and personal preference β€” and let you choose.

Lab-grown versus natural diamond comparison β€” Diagem Diamonds explains the differences in origin, value and certification
What to weigh up

Lab-grown at a glance.

01

Exceptional value

Expect a notably lower price than a comparable natural diamond β€” budget toward a larger or finer stone, or toward the setting.

02

Fully certified

Graded on the same 4Cs scale by the IGI or GIA, with the report stating clearly that the diamond is laboratory-grown.

03

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.

Build something with it.

A certified lab-grown diamond pairs beautifully with a bespoke engagement ring or a custom piece designed around it. 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.

First-Time Diamond Buyer? Here’s Exactly How It Works.

Call David β€” he’ll walk you through everything in plain language. No jargon, no pressure, no obligation.

πŸ“ž

Call David

082 551 2103 β€” 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 β€” just honest advice from 25+ years in the diamond trade.

πŸ‘οΈ

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 β€” nothing is a surprise.

🚚

Delivered to Your Door

Fully insured courier anywhere in South Africa. No need to travel β€” we bring the diamond to you.

β€œAnywhere in South Africa. Real diamonds. Real people. Real simple.”

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 β€” no chatbots, no automated responses. Real expertise. Real service.

πŸ“ž 082 551 2103
Let’s talk β†’
Good to know

Frequently asked questions

Are lab-grown diamonds real diamonds?
Yes. A lab-grown diamond is real diamond β€” the same carbon crystal structure, hardness and optical properties as a mined diamond. The only difference is origin: it is grown in a controlled environment rather than underground.
Are lab-grown diamonds certified?
Yes. We supply lab-grown diamonds certified by laboratories such as the IGI and GIA, graded on the same 4Cs scale as natural diamonds, with the report clearly stating the stone is laboratory-grown.
Why are lab-grown diamonds cheaper?
Because the supply chain is shorter and faster than mining, a lab-grown diamond of the same size and grade typically costs significantly less than a natural one β€” often letting you choose a larger or higher-grade stone for the same budget.
Will a lab-grown diamond test as a diamond?
Yes. Because it is chemically and physically diamond, it tests positive as diamond on a standard diamond tester. Distinguishing lab-grown from natural requires specialist laboratory equipment, which is why certification matters.

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. In most cases, we beat it outright.

Send Your Quote β†’
Compare your options

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.

We never share your details. By sending you agree to be contacted about your enquiry.

Ready when you are

Let's find your diamond.

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

Chat with David