What Is a Lab-Grown Blue Diamond?
A lab-grown blue diamond is a real diamond created in a laboratory using HPHT or CVD technology. The blue colour occurs naturally through the addition of boron during growth. Lab-grown blue diamonds have the same hardness, brilliance and crystal structure as natural blue diamonds but are typically available at a lower price and in a wider range of colours.
How are lab-grown blue diamonds created?
Growing real diamonds makes blue lab-grown diamonds in a laboratory using HPHT or CVD technology. A small amount of boron is added during growth, giving the diamond its natural blue colour. The finished stone has the same structure, brilliance, and durability as a mined blue diamond, but with greater consistency and a lower environmental impact.
One of our recent blue diamond engagement rings created as part of a remodelled ring commission. The ring combined our client’s original Hearts on Fire diamond between two intense blue diamonds.
For many years, our team has sourced natural fancy-coloured diamonds for trade and private clients seeking an alternative to a traditional white diamond.
Due to the rapid expansion of laboratory-created diamonds, we have seen increased demand and availability of fancy-coloured lab-grown diamonds. For this reason, we offer one of the largest selections of lab-created blue diamonds.
What Do Lab-Grown Blue Diamonds Cost?
Lab-grown blue diamonds generally cost significantly less than natural blue diamonds. Depending on colour intensity, shape and carat weight, most buyers choose blue diamonds between 0.70 and 2.00 carats for bespoke engagement rings.
In 2026 – 2027 lab-grown blue diamonds typically start from around £200 for a 1-carat diamond including a diamond grading certificate.
Natural fancy blue diamonds remain among the rarest and most expensive diamonds in the world, whereas laboratory-created blue diamonds provide a more accessible alternative.
Buying a Loose Lab-Grown Blue Diamond
Many clients prefer to choose a loose blue diamond before designing a bespoke engagement ring. This approach allows complete control over the diamond’s colour, shape, clarity and budget.
We source blue diamonds in a variety of shades and shapes, including round, oval, cushion, emerald and radiant cuts.
Search available blue diamonds using our online diamond search tool.
The Lab-Grown Diamonds Blue Colour Scale
Based on a selection of recent jewellery commissions, we have sourced a range of blue diamond shades, from light to deep blue. But remember, we typically source each diamond individually due to subtle colour variations from one commission to another.
| Blue Diamond Colour | Appearance |
|---|---|
| Pale Blue | Soft icy blue appearance |
| Sky Blue | Bright vibrant blue tone |
| Ocean Blue | Rich mid-blue colour |
| Teal Blue | Blue with subtle green undertones |
| Greenish Blue | Blue with stronger green influence |
| Fancy Deep Blue | Dark saturated blue |
| Fancy Vivid Blue | Intense electric blue |
Light Blue Diamonds
As a result, very few engagement ring commissions look alike, owing to the variety of hues. The reason lies in the treatment process and the introduction of Boron during manufacturing.
Just like natural blue diamonds, lab-grown blue diamonds exhibit a blue colour due to the presence of Boron in the diamond. The concentration of Boron and the presence of other chemicals, such as nitrogen, often cause variations in the diamond’s hue and colour intensity.
Teal Blue Diamonds
Teal blue diamonds combine a touch of green with blue, creating one of the most desirable colours for a lab-grown or natural diamond or gemstone.
Sizes, shapes and clarity for blue diamonds
Remember, there are far fewer blue lab-grown diamonds than white diamonds. For this reason, we recommend remaining open to the selection of available diamonds. We regularly source fancy-shaped blue diamonds in a selection of cuts—for example, Round, Princess, Emerald, and cushion-cut diamonds.
Many of our lab-grown diamond engagement rings feature centrepiece diamonds. Because of lower prices than natural diamonds, many buyers opt for carat weights between 0.70 and 1.50 for their engagement rings.
When it comes to diamond clarity, most lab-grown diamonds offer a very high level of clarity. In contrast, natural diamonds, although rarer, often feature visible inclusions and are usually given less consideration in the buying process.
We avoid low-clarity, rapidly grown lab-grown diamonds, such as the “Lightbox” brand of man-made diamonds made by De Beers. Instead, we source high-quality lab-created diamonds, fully certified and polished to meticulous standards with an exceptional diamond cut. We include a full lab grading report with every client purchase.
How to buy a blue diamond without seeing it in person?
Our diamond concierge service helps clients from local buyers to customers on the other side of the World. Our team work with high-resolution 360-degree videos and photography. As a result, we can send clients clear imagery to make their choice. In doing so, our clients receive the perfect natural or lab-grown blue diamond ring. Furthermore, we provided the added benefit of bespoke design.
Many of our clients not only look for a unique diamond but also a unique design to showcase the stone. We work with clients to design a CAD model and craft the perfect engagement ring with expert guidance at every step of their journey.
Ethical blue diamonds
A further benefit of a lab-created blue diamond comes from the ethical credentials associated with man-made diamonds. We verify that all of our diamonds are conflict-free. At the same time, lab diamonds provide a 100% ethical guarantee to buyers.
Teal blue diamond ring
One of our latest commissions provided the precise shade of diamond colour for our client. As part of the design brief, we sourced a teal-blue coloured diamond.
View the teal-blue diamond ring on our dedicated bespoke design page.
Mixing blue diamonds with alternative gemstones
By far, the best combination pairs a blue diamond with a white diamond, for example, at the heart of a custom-made diamond cluster engagement ring. Or, set either side of the coloured gemstone as part of a three-stone or blue diamond trilogy ring. An example appears below, created for an overseas client, featuring a lab-grown greenish-blue diamond surrounded by white diamonds.
Lab-grown vs natural blue diamonds
The following chart shows a comparison between both natural and lab-grown options.
| Criteria | Natural Blue Diamonds | Lab-Grown Blue Diamonds |
|---|---|---|
| Cost | Expensive | More affordable |
| Ethical Considerations | Potential ethical concerns | Guaranteed conflict-free |
| Environmental Impact | High environmental impact | Low environmental impact |
| Physical Properties | Same as lab-grown | Same as natural |
| Availability | Limited | Increasing |
| Rarity | Very rare | Less rare |
Frequently Asked Questions about blue diamonds
Where can you search for lab-grown blue diamonds?
You can search for lab-grown blue diamonds using Serendipity Diamonds online search tool. Use the online search filters to search for the perfect lab-grown blue diamond.
Where can I get my blue diamond set into a ring?
Serendipity Diamonds will set your diamond into any engagement ring style. Learn more about buying a ring mount or setting, from their existing ring collection or opt for a unique bespoke ring design.
Are lab-grown blue diamonds real diamonds?
Yes. Lab-grown blue diamonds are real diamonds. Rough diamonds are grown under laboratory conditions with the same chemical and optical properties as a mined diamond. Some blue diamonds achieve their colour through post-growth treatment, while others are grown with boron incorporated during the growth process.
Why are natural blue diamonds so expensive?
Natural blue diamonds occur without any interraction by man, apart from the cutting process. Their extreme rarity influences prices with many diamonds sold at private auction.
What causes a diamond to be blue?
For lab-grown blue diamonds, a small amount of boron is added during growth, giving the diamond its natural blue colour. In contrast, mined blue diamonds have chemicals such as boron naturally present from their formation process over millions of years.
Can blue diamonds be certified?
Yes. Most blue diamonds are sold with certificates. We provide GIA certificates for natural blue diamonds, and IGI certification with lab-grown blue diamonds. Certificates can be viewed alongisde diamond videos when using our online search tool.
Do blue diamonds fade in colour?
No. Colours are permanent, however extreme heat or irradiation can cause changes of colour. This rarely happens under temperature conditions experienced during jewellery making or repairs.
Which metal looks best with a blue diamond?
Platinum provides a cool, white neutral “canvas” for blue diamonds, contrasting beautifully with additional white diamonds. However, yellow gold offers a gorgeous warm contrast as seen in some of our bespoke blue ring designs.
What is the difference between a blue sapphire and a blue diamond?
Blue diamonds are carbon based, whereas blue sapphires are corundum. Both have similar levels of hardness, making both choices perfect for engagement rings.
Can I design my own blue diamond engagement ring?
Yes. Either contact our team to get help with CAD bespoke design, finding the perfect blue diamond, or a showroom consultation. Choose your own diamond and enjoy all the help needed to create your dream ring as part of our bespoke design process.
About Mark Johnson
Mark founded Isle of Wight jewellers Serendipity Diamonds in 2007 after a career in the polished diamonds industry. Today he works in the Serendipity showroom, helping clients with jewellery, creating handmade designs and updating their two jewellery websites SerendipityDiamonds.com and Isle-of-Wight-Jewellery.co.uk
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