4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds

4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds

Lab Created Diamonds Description

Lab-grown diamonds are also known as lab-made diamonds. There are two main methods to make the laboratory breeding diamond: CVD and HPHT.

Diamonds are considered the hardest material in the world. According to the Mohs hardness scale, it is divided into 10 grades, of which diamond is the highest grade. From the people know that diamond is composed of pure carbon that day, more and more people in laboratory breeding of high temperature and high pressure diamond were studied. At present, the laboratory raw high temperature and high pressure diamond industry develops rapidly and is widely used in various industries and processing industries.

High temperature and high pressure synthesis of diamond technology originated in the 1950 s, initially was applied in aviation and military industry, nearly 10 years to achieve a qualitative leap in technology, gem grade synthetic diamond both in quality and cost is up to the level of the market.

Artificial diamonds, often referred to as lab-grown HPHT diamonds, are created by mimicking the crystallization process of natural diamonds. Natural diamond to form in the natural environment, often mixed with other elements, which makes some natural diamonds are not completely transparent, will show the specific color. For example, some with a pink diamonds, some a bit blue, some with a light yellow. HPHT diamonds are grown in a laboratory and have fewer impurities than natural diamonds, so they are more pure and transparent.

Natural diamonds take millions of years to form. Before a volcano erupts, underground lava Wells about 150 to 200 kilometers deep can slowly cool in the crater, because the crater is often blocked. Pure carbon material pressure is 4.5 * 10 ^ 6 ~ 9 pa. When the temperature drops to 1000 ~ 1250℃, natural diamond crystals are formed. Deep inside the earth a few places have the physical and chemical conditions of forming the diamond.

However, under the condition of the natural growth of the production of natural diamond, can now be simulated in the laboratory, the use of high temperature and high pressure (HPHT) or chemical vapor deposition (CVD) techniques, in just a few weeks can produce the lab production of gem grade diamond.

Parameters Of Lab Created Diamonds

Characteristics Of Lab Created Diamonds

Lab grown diamonds in the chemical, optical and structure are the same as the mining of diamonds. What does that mean?

From a scientific point of view, synthetic diamond and natural diamond exactly the same, the only difference is that the formation of their location.

Lab Created Diamonds Details