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LAB-GROWN FANCY COLOURED DIAMONDS
Lab-grown fancy coloured diamonds have the exact same chemical composition, crystal structure and optical properties as their natural counterparts — the only difference is where they're formed. Instead of forming over billions of years deep within the earth, they're grown in a matter of weeks inside a controlled laboratory environment using either Chemical Vapour Deposition (CVD) or High Pressure High Temperature (HPHT) technology.
Just as with natural stones, colour in a lab-grown diamond comes from trace elements or structural characteristics introduced during formation — nitrogen, boron and hydrogen all play the same role in a lab as they do underground. This means a lab-grown fancy coloured diamond isn't an imitation; it's a genuine diamond with genuine colour, verified and graded by the same gemological laboratories used for natural stones.
Because supply isn't limited by geological rarity, lab-grown fancy coloured diamonds — including blue diamonds — are typically available in larger sizes and at a fraction of the price of their natural equivalents, without any compromise on beauty, durability or certification.
BLUE LAB-GROWN DIAMONDS
Blue is among the rarest and most prestigious fancy colours, famous from historic stones such as the Hope Diamond.
In a lab-grown blue diamond, this same colour is produced by boron introduced directly into the growth chamber — the exact same trace element that gives the rarest natural blue diamonds their colour. The result is a stone that is optically, chemically and visually identical to a natural blue diamond of the same colour grade.
GRADING OF LAB-GROWN FANCY COLOURED DIAMONDS
Lab-grown fancy coloured diamonds are graded using the exact same colour, intensity and quality standards as natural fancy coloured diamonds. Leading gemological laboratories — including IGI and GIA — assess hue, tone and saturation using the same nine-level intensity scale, and issue a full grading report that clearly states the diamond's laboratory-grown origin.
- Faint
- Very Light
- Light
- Fancy Light
- Fancy
- Fancy Intense
- Fancy Vivid
- Fancy Dark
- Fancy Deep
For blue diamonds, the deeper and more even the colour saturation, the greater the value — the same principle that applies to natural stones, just at a significantly more accessible price point.
WHY CHOOSE RÊVE DIAMONDS
At Rêve Diamonds, our lab-grown fancy coloured diamonds — including our blue collection — are fully certified, ethically produced, and offer exceptional value without compromising on beauty or brilliance. Cutting out the middleman means the savings are passed straight to you.
Whether you're designing a bespoke engagement ring or a unique piece of fine jewellery, our expert team will help you find the perfect lab-grown blue diamond. Book a private consultation — online or in-person at our London showroom — to explore our full certified collection.
SPEAK TO AN EXPERT
If you're looking for a lab-grown fancy blue diamond, our jewellery experts would love to help. Contact us with any questions or arrange an appointment at our London showroom. You can also reach us using the Live Chat facility on our site or by getting in touch via WhatsApp.
Frequently Asked Questions About Lab-Grown Fancy Blue Diamonds
What is a lab-grown blue diamond?
A lab-grown blue diamond is a real diamond, grown in a controlled laboratory environment rather than mined from the earth. Its blue colour comes from boron introduced directly into the growth chamber — the exact same trace element that gives the rarest natural blue diamonds their colour.
Is a lab-grown blue diamond a real diamond?
Yes. Lab-grown diamonds share the same chemical composition, crystal structure, hardness and optical properties as natural diamonds. The only difference is their origin, which is disclosed on every certificate.
How much more affordable are lab-grown blue diamonds than natural ones?
Because they aren't limited by geological rarity, lab-grown fancy coloured diamonds are typically significantly more affordable than natural stones of the same colour and intensity — often by 50% or more, especially in larger carat weights.
Are lab-grown blue diamonds certified?
Yes. Every lab-grown blue diamond we sell is independently certified by a leading gemological laboratory such as IGI or GIA, with the report clearly stating its laboratory-grown origin alongside its colour, clarity, cut and carat weight.
Are lab-grown blue diamonds a good choice for engagement rings?
Absolutely. Lab-grown blue diamonds offer the same beauty and durability as natural stones, with the added benefit of a fully traceable, ethical origin and a larger choice of sizes within most budgets.
How can I tell a lab-grown diamond from a natural one?
Visually, they're identical — even trained gemmologists cannot distinguish them by eye. The only reliable way to identify a lab-grown diamond is through specialist laboratory equipment, and every stone we sell comes with a certificate stating its origin.
Explore Our Collections
Blue Lab-Grown Diamonds
Lab-grown blue diamonds capture this legendary colour with full traceability and certification, at a price natural blue diamonds simply cannot match.
Use our diamond search tool to browse our current selection of lab-grown blue diamonds, filtering by shape, carat weight, cut, clarity and colour intensity to find the perfect stone for your bespoke design.
