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Lab-grown diamonds
The future of diamonds, grown and created with renewable energy.
Lab-grown diamonds
Lab-grown diamonds

Powered by the sun
Creating our jewels exclusively with lab-grown diamonds is a conscious choice. We can recreate Earth’s process of over a billion years in 600 hours through breakthrough science and technology to create a more sustainable diamond. All Unsaid diamonds are grown at our lab, ALTR Tech in Surat, India, which is powered by renewable energy. For every carat, a mined diamond requires 7300 litres of water and emits 160kg CO2. Whereas every carat of lab-grown diamonds requires just 1 litre of water and 12kg of CO2. (Trucost Report 2017)
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Pure carbon
A lab-grown diamond's crystal structure and chemical composition are identical to one extracted from the earth. The difference is that a lab-grown diamond is entirely pure. Classified as Type 11a, the most prized and collectable type of diamond, they have no chemical impurities on the lattice, which means that the entire diamond crystal is made of carbon. As a result, only 5% of mined diamonds can compare.

Unsaid diamonds are created by placing a diamond seed inside a sealed chamber heated to approximately 800° Celsius. Next, in a chemical vapour deposition (CVD) process, the chamber is filled with methane gas created from animal waste, hydrogen gas extracted from rainwater, and carbon gas, which ionises into plasma and breaks the molecular bonds of the gasses. Then, using the sun’s energy, the process of growing the diamond continues as the pure carbon adheres to the seed and crystallises, forming a diamond with the same scintillation, flash, fire and brilliance as a mined stone.
Avant-garde creation
Growing diamonds in a lab allows remarkable flexibility as size, cut, and colour can all be predetermined. We can now design our pieces first and then grow the diamonds to exact specifications, making genuinely remarkable and original jewellery pieces.
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"A lab-grown diamond is just that: a diamond. It has the exact same crystal structure and chemical composition as a mined diamond."

Nicholas Moltke, S.V.P Sales and Marketing

The science

Imagining a diamond is both an art and a science. Every diamond is conceptualised and grown by our expert technology partners

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Imagining a diamond is both an art and a science. Every diamond is conceptualised and grown by our expert technology partners

Unique cuts

We leverage three generations of diamond cutting expertise to craft every diamond that goes into our jewels.

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We leverage three generations of diamond cutting expertise to craft every diamond that goes into our jewels.

Our lab

All diamonds grown at the ALTR Tech lab in Surat, our avant-garde facility, are powered by renewable energy.

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All diamonds grown at the ALTR Tech lab in Surat, our avant-garde facility, are powered by renewable energy.

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