Laboratory Grown Diamonds

HPHT & CVD

Laboratory grown diamonds

HPHT & CVD

HIGH PRESSURE, HIGH TEMPERATURE

HPHT Lab Grown Diamond Process

Growing with High Pressure, High Temperature

HPHT Growth pods

These pods are aligned in warehouses and factories. Each one produces a Lab-Grown Diamond using the High Pressure, High Temperature method. They are grown in days or weeks. It depends on how large you want the diamond to grow.

The Anvils

Steel anvils in the Pod create an intense pressure. This simulates pressure between 5 & 6 GPa (equivalent to 150-190km down into the earth.) This can also be comparable to 80 elephants standing on your big toe.

The Cell

The cell contains a diamond seed crystal for the newly formed diamond to bond to. The heating element creates a temperature of 1300-1600°C. The carbon source (graphite or diamond powder) travels to the seed crystal by way of temperature gradient and a metal flux/ catalyst.

Growth Pattern

Structure

Chemical Vapor Deposition

CVD Lab Grown Diamond Process

The Reactor

This is a chamber CVD Lab Grown Diamonds form in. You can literally set it on a countertop. However, large control systems like the one behind it work in conjunction with the reactor. The energy source and diamond substrate can be seen up-close when viewed through the window.

The Chamber

Growth happens when a heated mixture of methane and hydrogen gases are broken down into carbon atoms by microwave plasma within the vaccuum chamber. The carbon atoms replace the hydrogen atoms on the surface of the diamond seed plates, growing diamond upward.

Growth Layer

Viewing the CVD Lab Grown Diamond slice, you can see the yellow section. This is the diamond seed crystal used. The upper colorless portion is the new CVD Lab Grown Diamond portion. The darker polycrystalline diamond grows off the seed cystal. It is removed by laser. The result of a finished CVD Lab Grown Diamond can be seen above.

Growth Pattern

Structure

CVD Color Treatment

Using HPHT

Precious Metals