Pink Lab-Grown Diamonds: Rarity, Colour and Care

Key Takeaways

• A pink lab-grown diamond is a real diamond, pure carbon and 10 on the Mohs scale, carrying a pink body colour instead of being colourless.

• Its pink comes from nitrogen-vacancy (NV) colour centres, usually created by disclosed post-growth treatment, not from a single added element.

• Natural pink comes from plastic deformation and the 550 nm absorption band, which GIA says no laboratory process currently replicates.

• A sound grading report states the colour grade, the growth method, and whether the stone had post-growth treatment.

• Pink is graded on colour, not the D-to-Z scale: hue, tone and saturation, from Faint to Fancy Vivid.

• "Rare" describes natural pink supply; a lab-grown pink is made to order, so judge it on even, attractive colour instead.

• The treated pink colour is permanent in normal wear, light and cleaning; only intense short-wave UV can cause a brief, reversible shift.

A pink diamond grown in a lab is a real diamond, but the way it turns pink is not the way a mined pink diamond turns pink, and that distinction is worth understanding before you buy. Choosing a pink lab-grown diamond comes down to three things: understanding where the colour comes from, judging that colour on hue, tone, saturation and evenness, and reading the certificate to see whether the stone was treated. Get those right, and the decision is simple.

This guide covers what a pink lab-grown diamond is, how the colour is made, whether it is rare, what really drives the price, how it differs from natural pink, and how to choose and care for one. You can also browse Reia's pink lab-grown diamond rings alongside this guide.

What Are Pink Lab-Grown Diamonds?

A pink lab-grown diamond is a real diamond grown in a laboratory that carries a pink body colour instead of being colourless. It shares the same chemical, physical and optical properties as a mined diamond.

"Body colour" is colour that runs through the whole stone, not a surface tint. In a colourless diamond, colour is a flaw and is graded down; in a fancy colour, it is the value. An even, attractive pink is exactly what makes a fancy-coloured diamond desirable.

It is not pink sapphire, morganite or pink cubic zirconia, which only share the colour. A pink lab-grown diamond has the same fire, brilliance and hardness as any diamond, scoring 10 on the Mohs scale. The only meaningful difference from a mined pink is how the colour is made, which the next section explains.

How Do Pink Lab-Grown Diamonds Get Their Colour?

Pink lab-grown diamonds get their colour from nitrogen-vacancy (NV) centres: microscopic defects where a nitrogen atom sits next to a gap in the carbon lattice. These NV centres absorb yellow and orange light, which leaves the pink you see. The diamond is grown with a trace of nitrogen, and it is the NV centres, not nitrogen alone, that create the pink.

This is different from a simple trace-element colour. In other lab-grown diamonds, nitrogen on its own produces yellow, boron produces blue, and radiation-related defects produce green. Pink is the one that depends on NV centres rather than a single element, which is why its production route is more involved.

Why Natural Pink Is Different (and Still a Mystery)

Natural pink diamonds get their colour from plastic deformation: the crystal lattice is bent under extreme pressure as the diamond forms, which produces a broad absorption band centred near 550 nm. GIA attributes the vast majority of natural pinks to this 550 nm band, while making clear that the exact atomic defect behind it is still unidentified (GIA, Gems & Gemology, Winter 2018).

Here is the point that matters most for trust. According to GIA researchers, there is no known way to replicate this plastic deformation, 550 nm colour, by any laboratory growth or treatment process. That is why a lab-grown pink uses NV centres instead of imitating nature's mechanism. Natural pink ranges from subtle to intense and can carry modifying hues such as purplish pink, orangy pink and brownish pink.

As-Grown Colour vs Post-Growth Treatment

Most commercial pink lab-grown diamonds are treated after growth. The usual route is a sequence of high-pressure, high-temperature (HPHT) annealing, irradiation and further annealing that creates the NV centres and brings out the pink. This treatment is disclosed on the grading report, so it is a disclosure point rather than a flaw.

A minority are grown pink (as-grown). Some chemical vapour deposition (CVD) diamonds take on colour during growth, though GIA notes these as-grown pinks are uncommon and tend toward orangy pink and are usually less vibrant than treated stones. For most pink stones on the market, the colour comes from NV centres that were created or enhanced by post-growth treatment, and the report states whether a specific stone was treated.

On stability, the treated colour is permanent under normal use, light and cleaning. This is a known, verified phenomenon, not a fading one, which is why reputable certification matters.

Reia describes its own pink route plainly: the stone is grown with a trace of nitrogen, and the NV centres are formed by a measured dose of radiation and moderate heat.

Are Pink Lab-Grown Diamonds Rare?

Pink lab-grown diamonds are not rare in the way natural pinks are. Because they are made to order, "rare" describes the natural supply, not the grown one.

Natural rarity is real. The Argyle diamond mine in Western Australia supplied roughly 90% of the world's natural pink diamonds, and it ceased operations in November 2020 with no comparable source to replace it. Pink is one of the rarest natural diamond colours.

A lab-grown pink is a different matter. Availability depends on production, not a geological accident, so pink can be grown to a chosen intensity and size. Available is not the same as common, though: a soft blush is easier to grow than a strong, even, large pink, and that affects both choice and cost.

So our position is simple. Do not buy a lab-grown pink because it is "rare". Buy it because the price is fair and the colour is even and attractive. Rarity is a reason to prize a natural pink; with a grown pink, you can simply choose the colour you want.

Pink Lab-Grown vs Natural Pink Diamonds

A natural and a lab-grown pink diamond of the same colour look identical and are chemically the same, both pure carbon at 10 on the Mohs scale. They differ in origin, how the colour forms, availability and price. 

• Colour formation: Natural pink develops through plastic deformation deep in the Earth over geological time. Lab-grown pink develops through NV centres, usually created or enhanced by disclosed post-growth treatment.

• Availability and pricing: Natural pink is scarce and expensive at every size, especially after the Argyle closure. Lab-grown pink is readily available and costs far less than natural pink of comparable size and saturation.

• Colour evaluation: Both should be judged on hue, tone, saturation and evenness.

• Certification: The report should state the colour grade and the colour origin, including whether the colour is natural or treated.

• Why some buyers still choose natural pink: Geological rarity, provenance and collectability.

What Affects the Price of a Pink Lab-Grown Diamond?

The price of a pink lab-grown diamond ring is driven first by colour (hue, intensity and evenness), then by the standard cut, clarity, carat and certification, and finally by everything around the stone in the ring. The finished ring price includes the metal, accent diamonds, making charges and tax, but the stone itself is still graded on the other three Cs. No single lever sets the price, and because prices change, the current figures live on the collection page rather than in this article.

Colour: Hue, Tone and Saturation 

Three things define a pink diamond's colour: hue (the colour itself plus any secondary tint such as purplish or orangy pink), tone (how light or dark it is), and saturation (how strong the colour is). Saturation is the main price driver. Fancy-coloured diamonds are graded by GIA on the presence of colour face-up, not on the D-to-Z absence-of-colour scale (GIA, Fancy-Colour Grading).

Intensity rises on a ladder from Faint to Fancy, Vivid and Fancy Deep. A clean pink is generally preferred over a brownish or greyish one, and even colour across the stone is better than patchy or zonal colour, though both are matters of preference rather than rules. There is no single "correct" level: a vivid pink makes a statement, a soft blush is easy to wear every day, and a lab-grown stone lets you choose the intensity rather than take what nature offers.

No single intensity is "best"; it is a matter of taste and budget, and what matters is that the colour is even and looks good to your eye.

How colour affects price at Reia: Reia offers its coloured lab-grown diamonds, including pink, from a published per-carat rate, with current prices shown on the live Chromatique and pink diamond rings pages. Compared with natural pink, which costs far more because of its rarity, a pink lab-grown centre is a more accessible way to get the colour. The final ring price also includes the gold, accent diamonds, making charges and applicable taxes.

Cut, Clarity and Carat

Colour leads, but a pink diamond is still shaped by cut, clarity and carat: cut keeps the colour lively, clarity keeps it clean to the eye, and carat sets size and cost. A step cut, such as an emerald cut, shows the colour clean and glassy, while a brilliant cut, such as a radiant cut, concentrates and lifts a soft colour, making a blush read richer. Clarity and carat behave here exactly as they do for any diamond. The key point is that with a lab-grown stone, you are mostly paying for the look you want, not for scarcity.

Certification and Treatment Disclosure

For a coloured stone, the grading report is the most important thing to read. For a pink lab-grown diamond, it should disclose three things: the colour grade, the growth method, and the post-growth treatment status.

An IGI Laboratory-Grown Diamond Report lists the colour grade (such as "Fancy Intense Pink"), clarity, cut, polish, symmetry and measurements, along with a comment describing the growth method (CVD or HPHT) and whether there are indications of post-growth treatment.

A pink diamond does not receive a Premium or Standard label, because GIA's Quality Assessment introduced on 1 October 2025 applies only to colourless to near-colourless lab-grown diamonds. Fancy-coloured lab-grown diamonds instead receive a GIA Laboratory-Grown Colored Diamond Report, which describes the colour and colour distribution and assesses the growth method and post-growth treatment. In other words, "GIA no longer grades lab-grown colour" is untrue: it grades it on a separate report.

Reia also references SDI certification on its pink stones. In India, the BIS hallmark and HUID independently certify the purity of the gold. Whichever lab issued the report, check the report number on that lab's own verification site and confirm it matches the girdle inscription ("Laboratory-Grown" plus the number).

How to Choose a Pink Lab-Grown Diamond

Use these five steps to find a stone that suits your taste, your design and your budget. 

1. Judge the colour evenness. Look at the stone face-up for an even, attractive pink, ideally under more than one light and, where possible, in person or by video consultation before you decide.

2. Choose your intensity. Decide between a soft blush and a vivid pink on taste and budget. More intense is not automatically better; the right shade is the one you love wearing.

3. Assess the cut. See how the cut carries and spreads the colour; shape and proportions change how the pink reads.

4. Verify the certificate. Confirm the report number matches the stone and read the treatment disclosure to understand how the colour was achieved.

5. Consider the whole ring. Weigh how the metal colour and setting affect the pink, along with the overall design and final cost.

If you want help comparing two stones, you can book a design consultation or video call. 

How to Care for Pink Diamond Jewellery

A pink lab-grown diamond needs no special daily handling. It is as hard as any diamond, and its colour is permanent with normal wear. There is one repair precaution for a treated-colour stone, and the gold around it and the security of the setting need the usual attention.

First, the colour, because it is the common worry: the pink will not fade under normal wear, sunlight and cleaning. The only caveat is a documented laboratory observation: GIA has recorded a brief, reversible shift under intense short-wave UV, where an NV-coloured pink can desaturate and then return to its stable pink within minutes under normal daylight (GIA, Gems & Gemology, Summer 2020). This is not fading.

For everyday care:

• Clean gently every couple of weeks. Soak in warm water with a few drops of mild dish soap, use a soft toothbrush behind the stone where oils collect, then rinse and dry with a lint-free cloth.
  
  

• Avoid chlorine bleach and abrasives such as toothpaste.
  
  

• Go easy on delicate designs. For antique or very delicate settings, heavy pavé, or pieces with softer or other coloured stones, check with a jeweller before scrubbing. Do not assume ultrasonic or steam cleaning is safe for every piece; leave those to a jeweller, as they can loosen stones or harm fragile settings.
  
  

• Take the ring off for the gym, gardening, harsh chemicals and chlorinated pools, and before applying lotion or perfume; store it separately in a soft pouch.
  
  

• Replate white gold as needed. Its bright finish comes from a thin rhodium plating that wears with daily use and is re-plated periodically.
  
  

• Have the prongs checked once or twice a year so a stone never loosens.
  
  

• Flag the treatment before any hot work. Because a pink's colour usually comes from post-growth treatment, tell your jeweller the stone is a colour-treated diamond before any repair or resizing that involves high heat, so the work is done with that in mind.

For resizing, repair, exchange and the rest of the after-sales terms, see Reia's lifetime exchange and buyback policy for the current details.

Pink Lab-Grown Diamonds at Reia

Reia's pink lab-grown diamond rings sit within its Chromatique coloured-diamond line, pink centre stones set in BIS-hallmarked gold and framed by white EF-colour, VVS-clarity diamonds. It is a small, carefully chosen edit rather than a wide range. The current pink-centre designs use two cuts that suit a soft colour: a radiant cut that lifts and brightens a blush, and an emerald cut that shows the colour clean and glassy.

On colour and certification, Reia states that its pink centres are lab-grown, with soft blush tones and verified colour and quality. 

• The stone is grown with a trace of nitrogen, and the NV centres are formed by a measured dose of radiation and moderate heat.
  
  

• The gold is BIS-hallmarked, 14KT (18KT on custom) in rose, white and yellow, and the white accent and pavé diamonds follow Reia's house standard of EF colour and VVS clarity.
  
  

In terms of how the metal changes the look, rose gold is romantic and tonal, white gold gives the most contrast and makes the pink stand out, and a halo or pavé adds scale and contrast. If none of the ready designs is quite right, Reia's in-house team can build a pink ring to a chosen depth of colour, shape, carat, setting and gold, with the design and size confirmed before manufacturing. You can buy in the Bengaluru, Coimbatore and Guwahati stores or through a live video consultation. 

See Pink Diamonds in Person

Because a pink's brightness and evenness read differently in daylight, store light and on camera, it is worth seeing the real stone under more than one light before you buy. GIA advises the same for coloured and fancy-shaped diamonds. On a Reia live video call, ask the consultant to hold the pink stone in both daylight and warm light as they show it on camera, so you can judge the colour in each. Every Reia store in Bengaluru, Coimbatore and Guwahati also carries the rings. 

Before You Buy: The Short Version

• Check the colour origin and verify any treatment disclosure on the certificate.

• Choose the pink intensity you genuinely love, not the one that sounds rarest.

• Examine the stone face-up under more than one light.

• Confirm the certificate matches the stone, and review all details before paying.

See the Collection

Ready to look? Browse Reia's pink lab-grown diamond rings, explore the full Chromatique coloured-diamond line, or book a consultation or video call to see the colour in person before you decide.

Frequently Asked Questions

Q.1 Are pink lab-grown diamonds real diamonds? 

Yes. A pink lab-grown diamond is pure crystallised carbon, scores 10 on the Mohs scale, and is chemically and optically the same as a mined diamond. It is not a simulant like cubic zirconia, morganite or pink sapphire. Its origin and much lower cost are the only things that set it apart from a mined pink diamond.

Q.2 Can you tell the difference between a natural diamond?

Not by eye or with a loupe. Natural and lab-grown pinks are identical in appearance, hardness and sparkle. The difference shows only on specialised gem-lab equipment and is recorded on the grading report, which states the growth method and any post-growth treatment. 

Q.3 Are pink lab-grown diamonds good for engagement rings?

Yes, and they make sense for a ring worn every day. At 10 on the Mohs scale, a pink lab-grown diamond is as hard and durable as any diamond; its colour is permanent under normal wear, and it costs a fraction of a natural pink, so a larger size or bolder colour stays affordable. 

Q.4 Do they hold resale value? 

Not as an investment. Like all diamonds, lab-grown stones sell below retail second-hand, and because they are made to order rather than scarce, you should buy one for the ring, not for resale. The practical route to value is a brand's own terms: see Reia's lifetime exchange and buyback policy for how upgrades and buyback work. 

Q.5 Are pink lab-grown diamonds treated?

Most are. The pink comes from NV centres, and while a few lab-grown pinks develop colour during growth, most are treated with controlled heat and radiation after growth. This treatment is disclosed on the grading report, so check the colour-origin or remarks line before buying. 

Q.6 Do pink lab-grown diamonds fade?

No. The colour is permanent under normal wear, sunlight and cleaning, so a pink lab-grown diamond will look the same years later. GIA has recorded a brief, reversible shift under intense short-wave UV that reverts within minutes in daylight; this is not fading. High heat during repair is the only real precaution. 

Q.7 Are pink lab-grown diamonds cheaper than natural pink diamonds?

Significantly. Natural pink is very scarce, especially since Argyle closed in 2020, while grown pink is made to order. Both are the same mineral, but for a similar look, you can expect to pay a small fraction of the natural price. 

Q.8 What is a nitrogen-vacancy centre in a diamond?

It is a small defect in the diamond's carbon lattice where a nitrogen atom sits next to a vacancy. These NV centres absorb yellow and orange light, which makes the stone look pink. In lab-grown pinks, they are usually created or strengthened by post-growth treatment. 

Q.9 What intensity of pink diamond should I choose?

It is taste, not a ranking. Intensity runs from Faint through Fancy, Fancy Intense and Fancy Vivid to the darker Fancy Deep. A vivid pink costs more and makes a statement; a soft blush is easy to wear daily. With a grown stone, you choose the depth rather than take what nature offers. 

Q.10 What is the difference between an as-grown and a treated pink lab-grown diamond?

Both get their pink from NV centres; the timing differs. An as-grown pink takes on colour during growth, mainly in certain CVD stones. A treated pink is grown first and then exposed to heat and radiation to form the centres. The report states which route produced the colour.