Our Biron Laboratory Grown Diamond will dazzle and shine with the same chemical, physical and optical properties as a mined diamond.
Before we talk about how laboratory grown diamonds are made, it’s important to understand how mined diamonds are formed as the processes are extremely similar – only one happens naturally while the other occurs in a laboratory.
Geologist believe mined diamonds were formed deep within the Earth, between 1 billion to 3 billion years ago. While they don’t know exactly how those diamonds came to be, they believe the process started with carbon dioxide that is buried roughly 100 miles beneath the Earth’s surface. The carbon dioxide is exposed to heat and put under extreme pressure. The diamonds are then transported from deep within the Earth’s core to the surface by way of volcanic explosions.
Diamonds can be classified into 4 types: 1a, 1b, 2a, 2b. Diamonds are classified according to the level of their chemical impurities. Type IIA mined diamonds make up 3% of mine diamonds. Type IIA diamonds are considered the purest form of diamonds. They contain no or very little impurities and are considered the most rare and valuable type of diamonds. They contain a very little amount of nitrogen, so they don’t easily absorb short wave light. They are colourless and are almost transparent. Lab grown diamonds are classed as type IIA diamonds.
There are two processes for producing lab grown diamonds – High Pressure, High Temperature (HPHT) and Chemical Vapor Deposition (CVD).
High pressure, high temperature (HPHT) diamonds are made in an environment that is similar to the environment favourable for the production of mined diamonds. There are three main press designs that are used to supply the pressure and the temperature required to produce lab grown diamonds. They are: the cubic press, the split-sphere press and the belt press. Diamond seeds are placed at the bottom of the press.
A HPHT diamond begins as a small diamond seed that is placed into carbon. Using one of the manufacturing processes above, the seed is exposed to temperatures of around 1500 degrees Celsius and pressurised to approximately 1.5 million pounds per square inch. The pure carbon melts and starts to form a diamond around the starter seed. It is then carefully cooled to form a pure carbon diamond.
CVD diamonds are grown from a hydrocarbon gas mixture in the chemical vapour deposition method. CVD diamonds begin as a thin slice of diamond seed, which is often a HPHT produced diamond. The diamond seed is placed in a sealed chamber and heated to around 800 degrees Celsius.
Over the next 10 to 12 weeks seeds go through various processes. The chamber is filled with a carbon rich gas, pressure and temperature create an environment that allows carbon atoms to break down and rain upon the seeds. As weeks go by, atom by atom, layer by layer, the seeds transform into Biron rough diamonds. Biron Laboratory Grown Diamonds acquire the same chemical, physical and optical properties as mined diamonds.
The rough diamonds are then cut and polished to exacting standards of high tech labs creating a beautiful bright Biron Laboratory Grown Diamond and is then laser inscribed by ADGL for added disclosure and identification. The Biron Laboratory Grown Diamond is then ready to be set into a stunning piece of jewellery for you to love and enjoy.
Our Biron lab experts select the finest quality diamond seeds and the best seeds are carefully positioned on a metal disk to be placed inside the diamond-growing reactor. It is most important to select seeds without any imperfections.
Our labs use both processes – High-pressure High-temperature (HPHT) and Chemical Vapor Deposition (CVD). The seed is placed inside a low-pressure microwave chamber.
Diamond seeds go through various stages over the next 10 to 12 weeks. A combination of gases, pressure and temperature create an environment that transforms seeds into rough diamonds. Hydrogen and methane gases are introduced. Carbon atoms rain on the seed, layering on top of it and fast-tracking the natural crystallisation process.
Through the ongoing process rough diamonds acquire the same chemical, physical and optical properties of mined diamonds.
The rough diamonds are then cut and polished to exacting standards of high tech labs creating a beautiful bright Biron Laboratory Grown Diamond and is then laser inscribed by ADGL, IGI or GIA, for added disclosure and identification.
The Biron Laboratory Grown Diamond is then ready to be set into a stunning piece of jewellery for you to love and enjoy.