How Much Does a Lab-Grown Diamond Cost? The Complete 2026 Price Guide

The price of a lab-grown diamond is one of the questions our clients ask most often before taking the plunge. And for good reason: buying a lab-grown diamond is an important decision, at the crossroads of emotion, budget and ethical values. At Laveran Paris, a jewelry house specializing in lab-grown diamonds for several generations, we have guided thousands of clients through this choice. This complete guide gives you everything you need to understand how prices are set, plan your budget and make an informed purchase.

What is a lab-grown diamond, and why does it cost less?

Before getting into prices, it is essential to understand what a lab-grown diamond really is. Contrary to a common misconception, it is not a fake diamond or an imitation: a lab-grown diamond has exactly the same chemical composition, the same crystal structure and the same optical properties as a natural diamond. The only difference is its origin: it is created in a few weeks in a controlled environment, where nature takes millions of years.

Two manufacturing processes coexist on the market:

• The HPHT method (High Pressure High Temperature): it reproduces natural geological conditions to crystallize carbon.
• The CVD method (Chemical Vapor Deposition): it deposits carbon atoms layer by layer, allowing very precise control of quality.

While a lab-grown diamond is structurally identical to a natural diamond, its price is significantly lower because its production is controlled and reproducible, and requires neither mining nor a complex international supply chain. This model is what allows Maison Laveran to offer you lab-grown diamond jewelry set in 18k gold or platinum at prices far more accessible than traditional high jewelry.

Lab-grown diamond prices: ranges by carat weight

Carat weight remains the leading price factor for a diamond, whether natural or lab-grown. The heavier the stone, the more its price per carat rises exponentially — because large stones are proportionally rarer to produce at high quality.

Lab-grown diamonds from 0.30 to 0.50 carat

For a small lab-grown diamond of standard quality (G-H color, VS2-SI1 clarity), expect to pay between €150 and €500 per stone, depending on the cut you choose. This size is ideal for a minimalist engagement ring or a discreet, refined diamond pendant.

1-carat lab-grown diamonds

The 1 carat is the absolute benchmark on the market. In France, in 2026, a 1-carat lab-grown diamond falls within the following ranges:

By comparison, a natural 1-carat diamond of equivalent quality generally costs several times more. This significant difference is what lets you choose a larger or higher-quality stone without going over budget.

At Laveran, the listed price covers the entire ring: an 18k gold solitaire with a certified 1-carat lab-grown diamond costs €1,744 in H/VS2 quality, €2,096 in F/VS1 and €2,360 in D/VVS1.

Lab-grown diamonds of 2 carats and more

Above 1.50 carats, prices rise noticeably. A 2-carat lab-grown diamond of standard quality falls between €2,500 and €5,000, depending on its clarity, color and cut. For very large stones (3 to 5 carats), prices can reach several tens of thousands of euros, while remaining well below their natural equivalents. At Laveran, a solitaire with a 2-carat lab-grown diamond starts at €2,960, and €4,440 for 3 carats, 18k gold setting included.

Compare prices in person, stone in hand

An advisor shows you several certified lab-grown diamonds in different carat weights and qualities, to find the best balance for your budget. In one of our 10 showrooms in France or by video call.

BOOK AN APPOINTMENT View engagement rings

Montaigne round solitairefrom €880Montaigne oval solitairefrom €880Odéon round ring (halo)from €1,480

The 4 factors that influence the price of a lab-grown diamond

Knowing the carat weight is not enough. The real price of a lab-grown diamond is always the result of a combination of four criteria, universally known in the diamond industry as the 4Cs.

Color

Diamonds are graded on a scale from D (exceptional white) to Z (slightly yellow). D to F stones, perfectly white, are the rarest and therefore the most expensive. In the G to I range, the difference is imperceptible to the naked eye and the value for money is excellent.

Clarity

Clarity measures the absence of internal inclusions and surface imperfections. The scale runs from FL (Flawless) to I3 (inclusions visible to the naked eye). For jewelry worn every day, VS1 or VS2 clarity gives an impeccable look without any unnecessary extra cost.

Cut

This is the criterion with the greatest impact on a diamond's brilliance. An Excellent or Very Good cut maximizes the refraction of light and gives the diamond its characteristic sparkle. A poor cut can dull even the most beautiful stone.

Carat weight

As mentioned above, weight directly affects price — and not in a linear way. A 2-carat diamond does not simply cost twice as much as a 1-carat diamond: it can be three to five times more expensive, depending on quality.

At Laveran Paris, our diamond experts help you identify the ideal combination of these 4 criteria based on your budget and your aesthetic expectations. Book an appointment in one of our 10 showrooms in France for personalized advice.

Lab-grown vs. natural diamonds: what is the real price difference?

The price gap between a lab-grown diamond and a natural diamond of identical quality has widened considerably in recent years. In 2020, a lab-grown diamond cost roughly 30 to 40% less than a comparable natural diamond. Today, the gap commonly exceeds 70 to 80%.

This shift is explained by the growing number of lab-grown diamond producers around the world, the falling cost of production equipment and increased competition between manufacturers. The trend should continue: in 2026, a complete solitaire with a very fine 1-carat lab-grown diamond commonly costs between €1,500 and €2,500. At Laveran, it is €1,744 in H/VS2 quality and €2,360 in D/VVS1, 18k gold setting included.

For colored diamonds, the difference is even more striking. At Laveran, a 1-carat blue, pink or yellow lab-grown diamond solitaire is the same price as a white diamond, €1,744, whereas a natural vivid colored diamond of the same weight runs into hundreds of thousands of euros.

Why certification matters when assessing price

Lab-grown diamond prices can only be compared between certified stones. Any quality lab-grown diamond must be accompanied by a certificate issued by an independent, recognized gemological laboratory. In France, the most respected certifications are:

• GIA (Gemological Institute of America)
• IGI (International Gemological Institute)
• HRD (Hoge Raad voor Diamant, Antwerp)

These documents confirm the stone's lab-grown origin and detail all of its characteristics according to the 4Cs standards. Since 2024, digital certificates accessible via QR code have become widespread to guarantee traceability. Lab-grown diamonds can be certified from 0.30 carat.

At Laveran Paris, every diamond in our selection comes with its gemological certificate. It is a guarantee of complete transparency for your purchase.

How much does lab-grown diamond jewelry cost at Laveran Paris?

Beyond the price of the stone alone, a piece of lab-grown diamond jewelry includes the cost of the setting (18k gold or platinum), the stone setting work and artisanal craftsmanship. Here are some guideline prices for our creations:

• Lab-grown diamond solitaire pendant: from €880, with a certified lab-grown diamond and an 18k gold setting. Discover our lab-grown diamond necklaces and pendants.
• Solitaire engagement ring: from €880, and €1,744 with a 1-carat diamond. Explore our collection of lab-grown diamond engagement rings.
• Diamond wedding band: from €536 for a half-eternity band and €704 for a full eternity band, depending on the number and size of the diamonds. Browse our lab-grown diamond wedding bands.
• Custom jewelry: bespoke work is at the heart of Laveran's DNA. Each creation is crafted in our Parisian workshops to your wishes, in 18k gold or platinum, with the diamond you have selected.

All our jewelry is handcrafted in our workshop in the 9th arrondissement of Paris, in the heart of the historic diamond district.

Our prices, carat by carat

To give you concrete benchmarks, here is the price of our Montaigne solitaire, including the 18k gold setting and a certified lab-grown diamond. The price is the same whatever the diamond shape: round, oval, pear, cushion, princess, marquise or emerald cut.

Price of our Montaigne solitaire in 18k gold (yellow, white or rose), IGI- or GIA-certified lab-grown diamond included. Same price for every diamond shape.

Our guides by shape: round · oval · pear · marquise · cushion · princess · emerald cut.

FAQ: your questions about lab-grown diamond prices

Does a lab-grown diamond lose value over time?
A lab-grown diamond, like a natural diamond, keeps its physical properties indefinitely: sparkle, hardness, brilliance. Its resale value, however, is lower than that of a natural diamond, because production prices tend to fall. We therefore recommend buying it first and foremost for the pleasure of wearing it, not as a financial investment.

Is the price of a lab-grown diamond officially set?
No. Unlike natural diamonds, whose prices are partly indexed to the Rapaport lists, lab-grown diamonds have no official price list. Prices vary by manufacturer, certification and market conditions. That is why it is important to rely on a trusted jeweler who explains their pricing with complete transparency.

What is the price difference between an HPHT diamond and a CVD diamond?
With equivalent characteristics (carat, color, clarity, cut), the two processes offer comparable prices. The difference may vary slightly from one supplier to another, but it is not systematic. The choice between HPHT and CVD depends more on the desired aesthetic characteristics than on budget.

Is a certified lab-grown diamond a real diamond?
Yes, absolutely. GIA, IGI or HRD certification confirms that the stone analyzed is indeed a real diamond, with explicit mention of its lab-grown origin. It is neither an imitation, nor a cubic zirconia, nor a moissanite.

Can I buy a lab-grown diamond without visiting Laveran Paris in person?
Yes. In addition to our 10 showrooms in France, we offer video appointments to guide you in your choice from any city in France. You can also discover our creations online and contact us for a personalized consultation.

Will lab-grown diamond prices keep falling?
That is the trend seen in recent years. Technological innovations in HPHT and CVD processes continue to reduce production costs. A gradual decline of 5 to 10% per year is expected, but the pace could slow as the market consolidates.

Conclusion: a fair price for an exceptional piece

The price of lab-grown diamonds is today one of the strongest arguments in favor of these extraordinary stones. Identical to natural diamonds in every respect, they give you access to larger stones, higher quality or settings in finer precious metals, while reflecting an ethical, responsible approach.

At Laveran Paris, drawing on six generations of diamond expertise, we put our knowledge at your service to guide you toward the piece that suits you, at the fairest price. Each stone is carefully selected, certified by a recognized laboratory and hand-set in our Parisian workshops.

Book an appointment with our experts and discover our lab-grown diamond fine jewelry collection.

Read our related articles:

1. Lab-grown vs. natural diamonds: the complete comparison
2. Lab-grown diamonds and wedding rings: trends and advice for a modern choice
3. Which certifications for a lab-grown diamond? GIA, IGI and HRD explained
4. Ethical lab-grown diamonds: why choose one for your wedding jewelry?
5. What is the average price of an engagement ring?
6. How to care for lab-grown diamond jewelry