Rectangular Shape GHI Color 8.0-9.0 Carat CVD Rough Diamonds For 2.5ct Cvd Diamond Enagement Ring Making

CVD Rough Diamonds​ Description

Lab grown rough diamonds include HPHT rough diamonds and CVD rough diamonds. Both HPHT and CVD are the two main methods to make lab grown rough diamonds.

How are lab grown rough diamonds made? Let's see the below two main methods which can make lab grown rough diamonds.

1. High pressure high temperature process (HPHT)

In the laboratory to create a high pressure and high temperature environment to produce lab grown diamonds, that is to imitate the formation conditions of mined diamonds in the depths of the earth. In the growth chamber, the carbon source decomposes in the molten metal, and the carbon atoms gather on a very small lab grown or mined diamond seed through the metal to form a unique lab created rough diamonds.

2. Chemical vapor deposition (CVD)

Lab grown diamonds are produced in a laboratory vacuum using carbon rich gases such as methane. The process of CVD is to decompose methane into carbon and hydrogen atoms, and then deposit them on diamond seeds to form square and flat lab grown diamond crystals.

How long does it take to make a lab grown diamond?

It usually takes weeks to make diamonds in the laboratory. Compared with the millions or even billions of years of mined diamond formation in the depths of the earth, it's very short for creating lab grown diamonds.

Due to the different formation conditions, the nature of mined diamonds and cultivated diamonds are also different. Natural diamonds grow into octahedral crystals (eight equilateral triangular facets), while cultivated diamonds can grow into both octahedral and cubic crystals (six square facets).

Parameters of CVD Rough Diamonds

CVD Rough Diamonds​ Introduction

​Natural diamonds are created by nature and are the result of high temperature and pressure formed over billions of years. The Rough Lab Grown Diamonds are produced in the laboratory, usually in a few weeks. The chemical difference between the two is same.

So how do you distinguish between Rough Lab Grown Diamonds and natural diamonds?

There is no obvious difference between the Rough Lab Grown Diamonds and natural diamonds. Even professional gemologists need special equipment to identify them. By zooming in, professionals will be able to discern subtle contrasts in diamond inclusions grown and mined in the laboratory.

CVD Rough Diamonds Details