3mm 4mm 5mm Rough Lab Grown Diamonds D E Color VVS VS Clarity
Contact Person : Li
Phone Number : +86 371 53395413
WhatsApp : +8615225124915
|Minimum Order Quantity :||Negotiate||Price :||Negotiate|
|Packaging Details :||Carton box||Delivery Time :||3-7 working days|
|Payment Terms :||T/T, Western Union||Supply Ability :||50000carats per month|
|Place of Origin:||Zhengzhou, China||Brand Name:||YUDA CRYSTAL|
|Product Name:||Lab Grown Rough Diamonds||Brand:||Yuda Crystal|
|Color:||DEF||Clarity:||VVS VS SI|
|Carat Weight:||35size To 20carat||Cut:||Uncut|
|Usage:||For Cutting Lab Grown Polished Diamonds||Component:||Carbon|
|Hardness:||Moh's 10 Scale||Available Type:||HPHT, CVD|
|Place Of Origin:||Zhengzhou, China||Payment Terms:||100% Payment In Advance|
|Payment Mode:||T/T, Bank Transfer, PayPal, Western Union||Delivery Time:||1-15 Working Days Depends On Quantity|
|Courier:||DHL, FedEx, UPS, TNT, EMS Etc||Packaging:||As Export Standard|
DEF Rough Lab Grown Diamonds 2cm,
Lab Grown Rough Diamonds 0.1cm,
Lab Grown Loose Diamonds 2cm
DEF Color Full White Lab Grown Rough Diamonds For Making Lab Grown Loose Diamonds
Lab Grown Rough Diamonds Description
Laboratory-grown diamonds, also known as laboratory-made diamonds, man-made diamonds and synthetic diamonds, are pure carbon diamonds that simulate the natural growth process of the earth under strictly controlled laboratory conditions.
What is high pressure high temperature (HPHT) diamond?
HPHT stands for High Pressure High Temperature Method, which is a main method used in laboratories to make diamonds. This diamond growth process requires carbon to be exposed to extreme temperature and pressure conditions, which simulate the extreme heat and pressure conditions when natural diamonds are formed in the depths of the earth.
The diamond seed crystal is placed under specially designed pressure conditions, and the growth chamber is heated to 1300-1600 °C, and the pressure is higher than 870,000 pounds per square inch (approximately 5,998,440 Pa). The molten metal decomposes high-purity carbon sources and deposits carbon atoms in one place. After the synthetic diamond starts to grow on a small diamond seed crystal, this laboratory-made crystal is cut by a diamond cutter.
In detail, HPHT diamonds are grown in a small chamber, which is located in a device that can generate extremely high pressure. The carbon raw materials (such as graphite) in the cabin are melted in a metal co-solvent composed of iron (Fe), nickel (Ni), cobalt (Co), etc., thereby reducing the temperature and pressure required for diamond growth. Then, the carbon material moves to the lower temperature diamond seed crystal with the help of the co-solvent, and crystallizes on it to form a synthetic diamond crystal. The crystallization process takes several days to several weeks to form one or more crystals.
Natural diamond crystals are often octahedrons, while HPHT synthetic diamond crystals usually have cubic surfaces in addition to the octahedral surface. Due to the different shapes of natural diamond crystals and HPHT synthetic diamond crystals, their internal growth patterns are also quite different. The difference in internal growth mode is a reliable way to distinguish natural diamond crystals from synthetic diamond crystals.
Synthetic gemstones that have been faceted usually show special color distribution characteristics, fluorescence partitions and twinning patterns, which are all related to the cross-shaped growth zone structure of the crystal. Sometimes this type of gemstone will also have dark metallic flux inclusions. In some cases, this material will exhibit phosphorescence, that is, after being exposed to an ultraviolet light source, it can continue to emit light even if the light source is turned off.
The production of colorless HPHT synthetic diamonds was once a big problem. Nitrogen turns diamonds yellow, so it must be excluded from the growing environment. In addition, high-clarity colorless diamonds require a longer growth time, and the temperature and pressure conditions required for their growth also need better control.
Parameters of Lab Grown Rough Diamonds
|Lab Grown Rough Diamonds Details|
|Brand Name||Yuda Crystal|
|Name||Rough Lab Grown Diamonds|
|Diamond Clarity||VVS1 VVS2 VS1 VS2 SI1 SI2 I1 I2|
|Diamond Carat Weight||0.03ct - 20.0ct|
|Size||1.0 - 20.0mm|
|Application||For Cutting Lab Grown Loose Diamonds|
|Place Of Origin||Zhengzhou, China|
|Delivery Time||1 - 7 Working Days Base on Order Quantity|
|Payment Terms||100% Payment In Advance|
|Payment Methods||T/T, PayPal, Western Union, Bank Transfer|
|Shipping way||DHL, FedEx, SF Express, UPS, EMS, TNT etc|
|Diamond Type||Synthetic(lab created)|
|Fire Dispersion||0.044(Same as Natural Diamond)|
|Brilliance Refraction Index||2.42(Same as Natural Diamond)|
|Relative Density||3.52(Same as Natural Diamond)|
|Chemical Composition||Carbon(Same as Natural Diamond)|
|Moh's Hardness||10(Same as Natural Diamond)|
Lab Grown Rough Diamonds Introduction
Natural diamonds are created by nature and are the result of high temperature and pressure formed over billions of years. The 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 Lab Grown Diamonds and natural diamonds?
There is no obvious difference between the 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.
|The Difference Between Lab Diamond And Natural Diamond|
|Properties||Earth Mined||Lab Created|
|SP3 Carbon Diamond Bonds (%)||100%||100%|
|Internal Crystal Structure||Face-Centered Cubic||Face-Centered Cubic|
|Color||Various Grades||K to D grades|
Lab Grown Rough Diamonds Details