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Diamonds have long been synonymous with luxury, love, and legacy. But today, their story can begin not only deep within the Earth, but also inside a laboratory. Lab grown or cultivated diamonds are redefining modern luxury by combining the brilliance of nature with the precision of science.

A question we often hear is:

“How long does it take to grow a diamond in a lab?”

The answer may surprise you, and it's a testament to just how far innovation has come. This blog will explore the diamond growing process, uncover how these diamonds are made, the time it takes, and what makes these diamonds a viable and stunning alternative to their mined counterparts.

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How Are Lab-Grown Diamonds Created, and How Long Does It Take?

Wonder how long it takes to create a diamond in a laboratory? Unlike natural diamonds that form over billions of years, lab-grown diamonds are created in just days or weeks using advanced technology.

These gems are genuine diamonds—identical in composition and structure to mined ones—created through two main methods: High-Pressure High-Temperature (HPHT) and Chemical Vapor Deposition (CVD).

HPHT diamonds typically form in 7-10 days for smaller stones and 2-3 weeks for larger ones. The CVD process generally takes 2-3 weeks but may extend to a month for premium stones.

Lab-grown diamonds offer compelling advantages: they're sustainable, 30-40% more affordable, available in rare colors, and ethically sourced—redefining luxury for conscious consumers without compromising quality or beauty.

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What is a lab grown diamond?

Before we discuss timelines, let's clarify what a cultivated diamond is. They are not imitations or simulants, unlike cubic zirconia or other synthetic imitations. Lab grown diamonds are real diamonds. Yes, you read that right. They are made of pure carbon and share the same composition, structure as natural diamonds, including the sparkle.

But instead of forming deep underground over billions of years under extreme heat and pressure, cultivated diamonds are created in high-tech labs that replicate these natural conditions in a fraction of the time.

Still wondering if they are identical? Discover whether you can tell a lab grown diamond from a natural one.

The diamond growing process explained

Two advanced methods

Lab grown diamonds are formed using one of two innovative techniques:

1. High-Pressure High-Temperature (HPHT):

This method replicates the Earth’s mantle intense heat and pressure. A tiny diamond seed is placed in a chamber and subjected to extreme heat (1500°C) and pressure (exceeding 5 GPa). Carbon atoms crystallise around the seed, forming a rough diamond.

2. Chemical Vapor Deposition (CVD):

This innovative process involves placing a diamond seed inside a chamber filled with a carbon-rich gas. The gas is superheated, causing carbon atoms to adhere layer by layer to the seed, slowly growing a diamond crystal.

For a closer look at these processes, read our detailed guide on how lab grown diamonds are made.

So, how long does it take to create a lab grown diamond?

The timeline for growing cultivated diamonds can vary, influenced by the chosen method and the desired size or quality:


Method

Small Stones

Larger or Premium Stones

HPHT

7–10 days

2–3 weeks

CVD

2–3 weeks

Up to 30 days or more


  • HPHT diamonds: often grown in just 7-10 days for smaller stones. Larger diamonds take 2-3 weeks.
  • CVD diamonds: typically require 2-3 weeks but can extend up to a month for larger or purer stones.


These timeframes are staggeringly short compared to the billions of years required for natural diamond formation, yet the result is equally authentic.

Are manufactured diamonds real diamonds?

Yes. Lab grown diamonds are graded and certified by the same gemological institutions as mined diamonds, such as the Gemological Institute of America (GIA) and the International Gemological Institute (IGI).

They are evaluated using the 4Cs: cut, colour, clarity, and carat—ensuring that each stone meets the highest standards of quality.

Learn more about the qualities that make lab grown diamonds a conscious and luxurious choice.
elderly woman wearing diamond earrings and necklace and enjoying the sun

How durable are lab grown diamonds?

When considering longevity, you can rest assured that these diamonds are eternally dependable. Rated a perfect 10 on the Mohs scale of mineral hardness, they are as durable as their mined counterparts. This means your precious jewel, whether a solitaire necklace or eternity band, can withstand a lifetime of wear and shine brilliantly.

If you’re asking, “How long do they last?”—the answer is, indefinitely.

Explore timeless designs by visiting our exclusive cultivated diamond eternity rings.

The size and brilliance of cultivated diamonds

Lab grown diamonds offer incredible versatility. Whether you desire a delicate 0.5-carat stone or a showstopping 10+ carat gem, the process allows for a range of options. The CVD method, in particular, enables the creation of larger, high-clarity diamonds ideal for bold and bespoke jewellery.

They also allow for rare colours, like blue, pink, or yellow, to be created more affordably than in nature, offering even more customisation possibilities.

Why choose lab grown diamonds?

Opting for this type of diamond goes beyond craftsmanship. Here’s why cultivated diamonds are captivating modern buyers:


  1. Sustainability: no mining is involved, preserving ecosystems and minimising the diamond industry's carbon footprint.

  2. Affordability: they cost up to 30- 40% less than natural ones of similar quality, allowing you to opt for bigger or higher-quality stones for less.

  3. Customisation: fancy diamond colours like pink or blue can be created in labs at a fraction of their natural counterparts’ prices.

  4. Ethical sourcing: by choosing lab-grown, you eliminate concerns over potential human rights issues.

Read more about celebrating special moments sustainably with cultivated diamonds.

Redefining modern luxury

A cultivated diamond ring is more than just a piece of jewellery; it embodies innovation, sophistication, and conscious consumerism. At Valquère, each piece symbolises timeless craftsmanship intertwined with modern ethics. From cocktail rings to pendants, our jewellery collection showcases bold designs for discerning individuals.

Discover modern luxury with our brilliant collection of lab grown diamonds at Valquère.

Final thoughts

Lab grown diamonds have redefined the meaning of luxury, delivering stunning brilliance, ethical integrity, and technological innovation in one gem. With creation times as fast as two weeks, they bring the allure of diamonds closer to everyone while respecting the planet.

Are you ready to make a conscious statement? Whether you’re shopping for an engagement ring or a bespoke necklace, explore Valquère’s collection today to find a jewel that resonates with your values.
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Fabienne Rauw