Lab-grown diamonds are real diamonds — formed using advanced technology rather than geological time. These stones are created in controlled laboratory environments, where scientists replicate the high-pressure, high-temperature conditions found deep within the Earth. The result is a diamond that is chemically, physically, and optically identical to one formed in nature.
They offer the same brilliance, durability, and beauty as natural diamonds, but are formed in just a few weeks instead of over billions of years. The primary difference lies in origin — not appearance or performance.
Natural diamonds are formed deep beneath the Earth’s surface, where carbon is subjected to intense heat and pressure over the course of 1 to 3 billion years. These extraordinary conditions cause carbon atoms to crystallise into diamond structures. Volcanic eruptions then carry these diamonds closer to the Earth’s surface, where they can be mined.
Each natural diamond is geologically unique — shaped by time, temperature, and pressure. Their finite supply and ancient origin give them rarity, making them highly valued as both emotional heirlooms and enduring symbols of love and commitment.
Lab-grown diamonds begin with a tiny carbon seed — often from a pre-existing diamond — and are grown using two main technologies: High Pressure High Temperature (HPHT) and Chemical Vapour Deposition (CVD).
HPHT (High Pressure High Temperature): This method replicates the natural conditions under which diamonds are formed. A diamond seed is placed into a chamber subjected to extremely high pressure and intense heat. Carbon atoms bond to the seed, gradually crystallising into a diamond.
CVD (Chemical Vapour Deposition): In this technique, a diamond seed is placed in a vacuum chamber filled with carbon-rich gases. When heated, these gases break down and release carbon atoms, which settle layer by layer onto the seed until a full diamond structure is formed. Some CVD diamonds are further refined with additional heat and pressure.
Both methods result in diamonds that are indistinguishable from mined diamonds to the naked eye. Once grown, the diamonds are cut, polished, and set — just like their natural counterparts.
Yes — lab-grown diamonds are real diamonds. The only distinction is origin. Here are some of the most common misconceptions:
"Lab diamonds are fake."False. Lab-grown diamonds have the same chemical and physical properties as natural diamonds.
"They look different."Also false. Even experts cannot distinguish between the two without specialised tools.
"Lab-grown diamonds aren’t durable."Not true. Lab diamonds are just as hard as natural diamonds, scoring 10 on the Mohs scale.
"Lab diamonds are flawless."No — like natural diamonds, lab diamonds can have inclusions and variations in clarity.
The takeaway? Lab-grown diamonds are 100% real, with the only difference being how and where they’re formed.
Here’s how lab-grown and natural diamonds compare across key characteristics:
Not by looking. To the untrained eye — and even to many professionals — lab-grown and natural diamonds are visually identical. Only gemmologists using advanced tools can detect differences, such as:
Growth structure: Lab-grown diamonds may show distinct growth patterns under magnification.
Inclusions: Lab diamonds sometimes contain metallic inclusions linked to the HPHT process, while natural diamonds may have mineral inclusions.
Laser inscription: Most lab-grown diamonds are laser-inscribed on the girdle to indicate their origin.
These differences are not visible during everyday wear and do not affect beauty or durability.
One of the most significant differences between lab-grown and natural diamonds is cost. Lab-grown diamonds are generally more affordable than their natural counterparts — often by 60% to 80% — even when comparing stones of similar carat, colour, clarity, and cut.
This price difference comes down to origin and supply. Natural diamonds are limited in availability and take billions of years to form, whereas lab-grown diamonds can be produced in weeks under controlled conditions. The ability to scale production makes lab-grown diamonds more accessible across a wider range of budgets.
For example: A 1.00ct natural diamond with excellent quality may range between $6,000 and $12,000. A 1.00ct lab-grown diamond of the same specs can cost between $1,200 and $2,500.
Lower price doesn’t mean lower quality — just a different origin. This makes lab-grown diamonds an excellent option for those seeking a larger stone, higher specifications, or more design flexibility without exceeding their budget.
Both lab-grown and natural diamonds offer beauty, brilliance, and durability — but the advantages of each will depend on your personal values and preferences. Below is a comparison of key benefits to help you navigate the choice more clearly.
Ultimately, both options offer exceptional quality. The best choice is the one that aligns with your intentions — whether you're drawn to science and sustainability, or rarity and heritage.
Just like natural diamonds, lab-grown diamonds are graded and certified by reputable gemmological laboratories such as GIA and IGI. These reports confirm the diamond’s:
This certification ensures you know exactly what you're purchasing — regardless of whether your diamond is lab-grown or mined.
There is no universally better option — only the one that best reflects your values, priorities, and what you’re hoping this diamond will represent.
Choose lab-grown if you're after exceptional value, a larger or higher-grade diamond within budget, or an option with lower environmental impact. Lab-grown diamonds are ideal for those who appreciate innovation and want a thoughtful, modern alternative.
Choose natural if you’re drawn to rarity, legacy, and the idea of wearing something that formed deep within the Earth over billions of years. Natural diamonds are often selected for their emotional and geological significance, and their long-standing value over time.
At Carmen & Lucy Fine Jewellery, we proudly offer both natural and lab-grown diamonds — each handpicked for beauty, brilliance, and integrity. Whether you're seeking timeless elegance or a contemporary approach, we're here to guide you towards a diamond that feels right for you and your story.
Whether you're exploring natural or lab-grown diamonds, we're here to help you find the right stone for your story. Browse our jewellery collection or enquire about a bespoke piece tailored to you.
