Our laboratory grown diamonds are created in similar conditions as naturally grown diamonds below the surface of the earth. Our experienced scientists have created an environment that has a combination of high pressure and high temperature. It is the exact same condition in which a diamond grows naturally. 

Diamonds are grown using two processes: 


High Pressure, High Temperature (HPHT) method

A rough HPHT lab-grown diamond is grown from a small diamond seed. The diamond seed is placed in an environment that contains carbon (the molecular component of diamonds) and a metallic liquid which will help the carbon to settle around the diamond seed. When applying the tremendous pressure and temperatures, under highly controlled conditions, the small diamond seed begins to grow, atom by atom, molecule by molecule, emulating nature’s process.

The temperature used is 1500 degrees which is almost the melting point of steel and the pressure used is 70 bars which is equivalent to the pressure of the Eiffel Tower put upside down on the tip of your finger.

The whole process results after a few weeks in a rough diamond which is later cut and polished like any other diamond and finally finds its place in a piece of jewellery.

Chemical Vapor Deposition (CVD) method

A rough CVD lab-grown diamond is grown from a diamond plate. The diamond plate is placed in an environment that contains 2 carbon containing gasses: hydrogen and methane. Once pressure and heat is applied, the carbon elements detach itself from the gases to form a plasma cloud. The temperature used in this process is between 800-900 degrees Celsius. This plasma cloud then detaches the carbon elements onto the diamond plate and finally a diamond will grow layer by layer.  A rough diamond then gets ready within a few weeks which then needs cutting and polishing just like any other diamond.


HPHT versus CVD

Each growing process delivers a different quality and colour of diamonds. Therefore, both are needed to be able to offer the full diamond range and colours like Madestones does.

Today, nobody will be able to distinguish a man made diamond from a naturally grown one once it has been cut and polished. A diamond grading lab, however, will be able to detect the same upon using a special equipment made to examine the structure of atoms.

Harnessing Renewable Energy to Craft Sustainable Lab-Grown Diamonds

At Madestones, we believe that luxury should never come at the cost of our planet. That’s why we’re proud to announce that all of our lab-grown diamonds are produced with 100% renewable energy, paving the way for a more sustainable future.

Harnessing the power of nature, our diamonds are crafted using solar panels, windmills, and green energy sourced from the grid. This commitment to renewable energy not only reduces our carbon footprint but also ensures that each sparkling gemstone is ethically and responsibly created.

Solar Power: Capturing the Sun’s Energy

Our solar panels capture the abundant energy of the sun. This renewable source of power drives our operations, ensuring that each diamond cultivated under our care is a product of the sun’s clean and limitless energy.

Wind Energy: Channelling Nature’s Force

In addition to solar energy, Madestones embraces wind power through windmills that gracefully harness nature’s own force. The windmills generate electricity efficiently, further contributing to our sustainable practices and minimizing reliance on non-renewable energy sources.

Green Energy from the Grid: Commitment to Clean Power

Madestones also prioritizes green energy sourced from the grid. By partnering with providers of renewable electricity, we support the broader transition towards sustainable energy infrastructure, advocating for a future where eco-friendly practices are the norm.

A Greener Approach to Diamond Cultivation

Our dedication to sustainability extends beyond renewable energy. From responsibly sourcing materials to minimizing waste in our production process, we’re constantly striving to reduce our environmental impact at every stage of our operations.

Join Us in Shaping a Sustainable Future

Choosing a lab-grown diamond from Madestones isn’t just a choice for beauty; it’s a choice for a brighter, greener future. With each dazzling Madestones diamond, you can rest assured knowing that you’re making a sustainable and ethical choice that preserves the natural world for generations to come.

Join us in our mission to shine bright while treading lightly on the planet. Explore our collection of lab-grown diamonds today and be a part of the sustainable luxury revolution. Together, we can make a difference — one diamond at a time.


How do you support your claim towards sustainability? What differentiates you from the market? What steps do you take towards carbon neutrality?  For some time most of you have been asking Madestones these questions. We have taken the steps forward and we are proud to announce that Madestones has been certified Carbon Neutral.

The label is provided by CO2-logic, and validated by the accredited and international independent certification body Vinçotte. There are many CO2-Neutral certifications around the world but few are third party validated by a serious & credible certifier.

Alongside this, the certification process also complies with the internationally recognised PAS 2060, which sets out the requirements for achieving and demonstrating carbon neutrality.
The PAS 2060 standard is the first international certification at the highest level for organisational carbon neutrality. It is currently the most used standard by a range of companies to show their involvement in becoming carbon neutral and their environmental integrity. It builds further on the ISO 14001 and PAS 2050 standards, and is published by the British Standard Institution (BSI).

Madestones CEO Thierry Silber comments: “This “CO2-Neutral” label not only guarantees real climate protection efforts, it also empowers companies to break through the fog of empty environmental claims. This label is for consumers and procurement departments of any organization seeking to buy more responsibly. It is the recognition of real efforts to save our planet.

The Cutting of our diamonds, the Factory

The plant has successfully succeeded in the “SMETA” audit, one of the most widely used ethical audit formats in the world.

SMETA carries out high quality audits covering all aspects of corporate responsibility and covering 4 pillars:

  •  Health and Safety
  •  Labour standards
  •  Environment
  •  Business ethics

We believe this audit is necessary to meet our commitment to transparency, ethical practices and social responsibility at all levels of our supply chain.

The unit now employs more than 200 people. Equipped with state-of-the-art technology, the factory in India produces high quality cut diamonds and also ensures a constant supply. At Madestones, we have highly trained professionals who use state-of-the-art technology to achieve optimal results. Our production process starts with the acquisition of the raw materials and ends with polished stones, perfectly sorted according to the strict quality standard that applies at Madestones.