Common Myths About Lab-Grown Diamonds

As lab-grown diamonds continue to grow in popularity, so too do the misconceptions surrounding them. Questions about authenticity, quality, value and how they compare with natural diamonds can make choosing the right stone feel more complicated than it needs to be.

This guide separates fact from fiction, helping you understand what lab-grown diamonds really are and what actually matters when choosing one.

MYTH 1: LAB-GROWN DIAMONDS AREN'T REAL

Fact: Lab-grown diamonds are real diamonds.

A lab-grown diamond is not an imitation or an alternative material. It is a genuine diamond, with the same chemical composition, crystal structure, hardness and optical properties as a natural diamond. It can display the same brilliance, fire and scintillation, and has the same enduring durability that makes diamond such a remarkable material.

The difference is simply where the diamond comes from. Natural diamonds form deep within the Earth over billions of years, while lab-grown diamonds are cultivated in carefully controlled laboratories over a matter of weeks. Different origin, same diamond.

This is also what distinguishes lab-grown diamonds from diamond simulants such as cubic zirconia or moissanite. Simulants are different materials that are designed to look like diamond; a lab-grown diamond is diamond.

And just like a natural diamond, a lab-grown diamond can be independently graded and certified. Leading gemmological institutes such as the International Gemological Institute (IGI) assess lab-grown diamonds using the recognised 4Cs — cut, colour, clarity and carat weight — giving you an independent record of the qualities of the individual stone.

MYTH 2: YOU CAN TELL THE DIFFERENCE

Fact: Not by looking at them.

To the naked eye, there is no visible difference between a lab-grown diamond and a natural diamond. They have the same chemical, physical and optical properties, which means they can have the same brilliance, fire, scintillation, hardness and durability.

Traditional diamond testers also cannot reliably determine whether a diamond is lab-grown or natural. The difference lies in how the diamond was formed, not in something that can be seen simply by looking at it.

To determine a diamond's origin, gemmologists use specialist equipment to examine characteristics within the stone that reveal its growth history. This analysis can identify whether a diamond is natural or lab-grown and, where possible, the method used to grow it.

So while a diamond's origin can be established by specialist analysis, it isn't something you can see with the naked eye.

MYTH 3: LAB-GROWN DIAMONDS DON'T HOLD VALUE

Fact: A diamond is rarely bought as an investment.

For most people, an engagement ring or piece of fine jewellery is bought to be worn, enjoyed and eventually passed down, rather than with the expectation of making a financial return. There are exceptions, of course. Exceptionally rare or valuable pieces can be sought after by collectors and traded through specialist dealers and auction houses, but that is a very different market from most personal jewellery.

Lab-grown diamonds do generally have a lower resale value than natural diamonds. However, they also cost considerably less to purchase in the first place. Looking only at the amount a diamond might resell for, without considering what was originally paid, doesn't tell the whole story.

The more meaningful difference is what your budget can buy you today. Because lab-grown diamonds are more affordable than comparable natural diamonds, you can choose to put more of your budget towards the qualities you value — whether that's a larger carat weight, a higher colour or clarity grade, or simply the diamond you love.

If you're looking for a financial investment, an engagement ring probably isn't the place to start. But if you're looking for a beautiful diamond to wear, enjoy and perhaps pass down through generations, lab-grown offers an opportunity to choose more diamond for your budget.

MYTH 4: ALL LAB-GROWN DIAMONDS ARE THE SAME

Fact: Lab-grown describes a diamond's origin, not its quality.

Just because two diamonds are both lab-grown doesn't mean they will look or perform in exactly the same way. Like natural diamonds, lab-grown diamonds come in a range of cut, colour, clarity and carat weights, and these characteristics all contribute to the appearance of an individual stone.

The 4Cs give you a consistent way to understand these differences. Two lab-grown diamonds with the same carat weight, for example, can have different colour, clarity or cut grades — and therefore look quite different from one another.

This is why the diamond itself matters, not simply how it was formed. A well-cut diamond with beautiful proportions can return light brilliantly, while colour, clarity and carat contribute to its overall character and presence.

Lab-grown tells you where a diamond came from. The 4Cs help tell you what that particular diamond is like.

MYTH 5: LAB-GROWN DIAMONDS COST LESS BECAUSE THEY'RE LOWER QUALITY

Fact: A lower price doesn't mean lower quality.

Lab-grown diamonds are priced differently from natural diamonds because they have a different origin and can be produced in a controlled environment rather than being recovered through mining. Their shorter formation time and ability to be produced using established laboratory processes mean they are not subject to the same geological rarity that influences the price of natural diamonds.

That doesn't make them a lower-quality material. Lab-grown diamonds are diamonds, with the same fundamental chemical, physical and optical properties as natural diamonds, and they are graded using the same 4Cs of cut, colour, clarity and carat weight.

This also means that questions about whether lab-grown diamonds can turn yellow, become cloudy or lose their brilliance over time are based on a misunderstanding of what a lab-grown diamond is. They don't. A lab-grown diamond's colour and fundamental properties remain stable over time, just as they do in a natural diamond. If a diamond appears less brilliant, surface oils, lotions or other residue can affect its appearance, but this is simply a matter of cleaning rather than the diamond deteriorating.

As with any diamond, the individual stone still matters. Cut, colour and clarity all contribute to its appearance, which is why we carefully select the diamonds we use at True Brilliance to meet our standards for beauty and quality.

Lab-grown doesn't mean lower quality. It means a different origin — giving you the opportunity to choose a beautiful diamond at a different price point.

FINAL THOUGHTS

The more you understand about lab-grown diamonds, the clearer the choice becomes. They are genuine diamonds, with the same fundamental diamond properties, but a different origin and a different place in the diamond market.

For many people, that offers an appealing way to choose a beautiful, high-quality diamond based on the qualities that matter most to them — from cut and colour to clarity, carat and overall appearance.

The choice is ultimately yours. What matters is choosing a diamond you love, and feeling confident in why you've chosen it.