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. To achieve this goal, Madestones has contracted 4 production units.

Today, nobody will be able to distinguish a lab-grown 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.