What are Lab Grown Diamonds?

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What Are lab grown diamonds?

CVD stands for CHEMICAL VAPOUR DEPOSITION,
This is one way to create diamonds in a laboratory. The growth of this lab-grown diamond requires appropriate pressure and temperature are applied to the hydrocarbon mixture in the vacuum chamber.

The growth process

CHEMICAL VAPOUR DEPOSITION

A grown diamond seed crystal is placed in the chamber.

Injecting carbon-molecule gas into the growth chamber

Heat the growth chamber to 900-1200 °C.

The microwave beams drop the carbon from the plasma cloud and deposit it on the seed crystals.

The grown diamonds are removed every few days, the top surface of the grown diamonds is polished to remove non-diamond carbon from them, and then returned to the growth chamber. Each batch of lab-grown diamonds may go through several start/stop cycles, and the entire growth process takes three to four weeks

Once the synthetic diamond crystals are removed, the crystals can be cut to make diamonds.

What is the difference between Lab Grown diamonds and Mined diamonds and moissanite?

Lab Grown Diamonds and Mined diamonds are identical in phyiscal, chemical and optical properties. While Moissanite is silicon carbide, it is a totally different materials.

There is no visual difference between Lab Grown Diamonds and Mined diamonds, and high-level jewelry appraisers can’t tell the difference with the naked eye! However Moissanite is only similar in appearance, it will have an unnatural sparkling, and people can also distinguish Moissanite and diamonds.

The relationship between Mined diamonds and Lab grown diamonds and moissanite is like: natural pearls, cultured pearls and plastic pearls