Revolutionising with lab grown diamonds

Certified diamonds, grown in a lab. Identical in every way, chemically and visually.

Genuine and beautiful

Our lab-grown diamonds are chemically, physically and aesthetically identical to mined diamonds; and they're cut to the same high standard.

They come certified by the same authority that certifies mined diamonds. They are absolutly the real deal.

Excellent Value

Lab diamonds are more affordable than mined diamonds, which means we can sell you a higher quality stone for your budget. The decision to buy a lab diamond is a decision to get a superior product for your money.

  • Savings of 30% to 60% on white diamonds
  • Savings of 60% to 90% on coloured diamonds

Supremely Ethical

Lab grown diamonds are an ethical choice with little environmental impact. We can absolutely guarantee no traces back to conflict diamonds and we're not mining our fine earth to extract them.

Imagine two diamonds. Both are stunningly beautiful, with identical physical and chemical properties. It is only the journeys these stones have taken to arrive before you that are different. In one diamond's case, over 200 tonnes of soil had to be shifted to unearth it - a massive feat of brute force. It was not strength, but scientific brilliance, that gave us the newer of the two; a young stone whose journey begins with you.

supremely ethical

Available in a wide array of cuts, clarities and colours.

Lab grown diamonds are grown from 'seeds' - tiny diamond fragments that flower into flawless mature stones.

How Lab Diamonds are Grown

How are diamonds grown?

Lab grown diamonds are grown from 'seeds' - tiny diamond fragments that flower into flawless mature stones, thanks to the attention and expertise of skilled technicians working in cutting edge laboratories.

A complex mix of gases is applied to the seed under high temperature, causing the diamond to grow, atom-by-atom, until a perfect gemstone as good as any mined diamond is formed. Only a few labs around the world are capable of producing gem-quality diamonds at the present time.

Nightingale is one of the first businesses to sell lab grown diamonds in the UK. These are the very same diamonds you've always known and loved, but they tell a new and remarkable story.

How do our lab grown diamonds compare?

The table below shows there is an enormous difference between our lab diamonds and the stones known as diamond simulants.

  DiamondsOther Simulants
  MinedOur Lab GrownCZMoissaniteWhite SapphireYAG
Chemical Composition C C ZrO2 ZrO2 AI2O3 Y3AI5O12
Crystalline Structure Cubic Cubic Cubic Hexagonal Hexagonal Cubic
Refractive Index 2.42 2.42 2.20 2.65 1.77 1.83
Dispersion 0.044 0.044 0.066 0.104 0.018 0.028
Hardness 10 10 8.25 9.25 9 8.25
Density 3.52 3.52 5.70 3.21 3.97 4.60

Our grown diamonds are made up of carbon atoms arranged in exactly the same structure you'd find in a mined diamond. Cubic zirconia, moissanite and other diamond simulants are not true carbon crystals - rest assured we never work with these diamond look-alikes. When you buy our lab diamonds you get the real thing.

Certified Origin

As our lab diamonds are almost impossible to differentiate from mined diamonds, we always provide a certificate of origin with our stones. This certificate is an assurance of ethical and eco-friendly manufacture.

The certificate also ensures that the customer is not misled, if they want a lab grown diamond the certificate confirms that is what they have purchased, and equally, if a mined diamond is their choice the certificate confirms this is what they have purchased.

Speak with an expert

Our lab-grown diamonds are chemically, physically and aesthetically identical to mined diamonds.

Dedicated to ethical sourcing

Lab diamonds are more affordable than mined diamonds, which means we can sell.

Proud to pioneer a revolution

Nightingale is the first British brand to sell jewellery made with lab grown diamonds. The Sunday Times picked up on our ground breaking story in May 2016, and since then we've had coverage from The Guardian, the Mirror and many others. In some parts of the world - especially the United States - lab diamonds are everywhere, but the UK has been slow to catch up.

We're deeply proud to be at the vanguard of a shift in the British jewellery industry that's going to see manmade diamonds take their rightful place in the jewellery boxes of the nation! We offer our customers the choice to buy lab diamonds loose, or have them incorporated into a piece of jewellery. However at Nightingale we are happy to offer customers a choice of lab grown or mined diamonds, personal choice is important to us and we are happy to support our customers with their purchases.