Diamonds are traditionally associated with rarity, romance and permanence. However, they are no longer found only beneath the ground. Laboratory-grown diamonds have become widely available, giving buyers another option when choosing stones for engagement rings, wedding jewellery and bespoke pieces.
They can offer excellent beauty and quality, often at a lower initial price than a comparable natural diamond. However, lab-grown does not automatically mean ethical, sustainable or better. As with any gemstone purchase, it is worth understanding what you are buying and asking the right questions.
WHAT IS A LAB-GROWN DIAMOND?
A lab-grown diamond is produced in a controlled environment rather than formed naturally within the Earth.
Most are created using one of two methods: High Pressure High Temperature, usually shortened to HPHT, or Chemical Vapour Deposition, known as CVD. Both processes create the conditions needed for diamond crystal to grow.
Lab-grown diamonds have essentially the same chemical composition, crystal structure and physical properties as natural diamonds. They are genuine diamonds, but their origin and growth history are different.
They can be cut into the same shapes and assessed for many of the same qualities, including cut, colour, clarity and carat weight. Like natural diamonds, their appearance and quality can vary considerably.
LAB-GROWN DIAMOND OR DIAMOND SIMULANT?
Lab-grown diamonds are sometimes confused with diamond simulants, but they are not the same thing.
Moissanite and cubic zirconia may be cut to resemble diamonds, but they are different materials with their own chemical and optical properties. A lab-grown diamond, by contrast, is made from crystallised carbon just like a natural diamond.
These differences are not always obvious to the unaided eye. Natural diamonds, lab-grown diamonds and good-quality simulants can sometimes look very similar without specialist testing.
This is why clear descriptions, reputable suppliers and appropriate documentation are important.
HOW DO LAB-GROWN AND NATURAL DIAMONDS DIFFER?
The principal difference is their origin.
Natural diamonds formed deep within the Earth over an immense period of time. Lab-grown diamonds are manufactured using technology that recreates some of the conditions required for diamond growth.
One is not automatically more beautiful than the other. Both can have inclusions, colour variations and differences in cut quality. Both can also be damaged if poorly handled or set, despite diamond being an extremely hard material.
Their prices and potential resale values can be very different. Lab-grown diamonds frequently have a lower initial purchase price, allowing some buyers to choose a larger stone or allocate more of their budget to the design and craftsmanship of the finished piece.
However, prices within this relatively young and rapidly changing market can fluctuate. I would never suggest choosing either type of diamond purely as a financial investment. Jewellery is better selected for its meaning, beauty and suitability for the person wearing it.
DOES LAB-GROWN AUTOMATICALLY MEAN ETHICAL?
No gemstone should be described as ethical or sustainable simply because of where it was produced.
Growing diamonds requires specialist equipment and considerable energy. The environmental impact can vary according to the manufacturing process, the source of that energy, the location of production and the information available about the supply chain.
Natural diamonds also vary in their provenance and traceability. Previously owned or recycled natural diamonds can provide another option, particularly when an existing family stone can be reset rather than replaced.
Broad claims such as “eco-friendly”, “conflict-free” or “sustainable” should be supported by clear evidence. If these issues are important to you, ask where the stone was produced, whether its origin can be traced and exactly what any environmental claim is based upon.
There is rarely one perfect answer. The best choice is usually an informed one that reflects your own priorities.
WHAT SHOULD YOU CHECK BEFORE BUYING?
Begin by confirming whether the stone is natural, laboratory-grown or a simulant. This information should be clearly stated rather than hidden within vague descriptions.
For a significant lab-grown diamond, ask whether it has documentation from a recognised independent gemmological laboratory. Check what the report assesses, whether any post-growth treatments are recorded and whether the stone has an identifying inscription.
Look at the stone itself rather than concentrating only on numbers. Cut quality has an enormous influence on how a diamond handles light, so a beautifully cut smaller stone may be much more appealing than a larger but poorly proportioned one.
You should also consider how the stone will be worn. The design, setting, metal and lifestyle of the wearer all influence whether a particular gemstone is suitable.
Finally, buy from someone who is prepared to explain the options clearly. You should never feel pressured into selecting the largest stone or the most expensive option.
WHAT ABOUT MOISSANITE, WHITE SAPPHIRE OR RECYCLED DIAMONDS?
A diamond is not the only choice for a bright, colourless or near-colourless gemstone.
Moissanite is durable and has a lively appearance, although its pattern of sparkle differs from diamond. Some people love its colourful fire, while others prefer the appearance of a traditionally cut diamond.
White sapphire offers a softer, more understated look. It does not produce the same brilliance as diamond or moissanite and may require more regular cleaning, but it can be a beautiful option in the right design.
Recycled or previously owned diamonds are natural diamonds that are already in circulation. They may come from antique jewellery, inherited pieces or older settings that are no longer worn. Where suitable, they can be removed, checked and reset into something new.
Coloured gemstones are another possibility. Sapphires, rubies and many less traditional stones can bring personality and meaning to a bespoke design.
CHOOSING A STONE FOR BESPOKE JEWELLERY
Choosing a gemstone should not feel like passing an exam. My role is to help you understand the practical differences and find an option that suits your design, budget and values.
During the bespoke jewellery process, we can discuss natural and lab-grown diamonds alongside alternative gemstones. I can also assess whether stones from existing or inherited jewellery might be suitable for reuse.
There is no universally correct choice. Some people value the geological history of a natural diamond. Others prefer the size and price possibilities offered by a lab-grown stone. Some discover that they love a completely different gemstone once they see the options.
What matters is that you know what you are buying and feel comfortable with the decision.
WANT TO TALK THROUGH THE OPTIONS?
If you are planning a bespoke ring or another meaningful piece of jewellery, contact me to arrange an initial conversation.
We can discuss the design you have in mind, how the jewellery will be worn and which natural, lab-grown or alternative gemstones might work for you. There is no pressure to arrive with all the answers—that is what the design process is for.
