3.0-4.0ct DEF Color VS SI Mix Quality Lab Made HPHT Rough Diamonds
Lab Made HPHT Rough Diamonds Description
Laboratory-grown diamonds are grown by simulating the growth
environment of natural diamonds through high-temperature and
high-pressure methods or chemical meteorological deposition. Their
chemical, physical, atomic, and optical properties are the same as
natural diamonds; we call them "laboratory-grown diamonds."
There are two processes for laboratory-grown diamond
manufacturing-chemical vapor deposition (CVD) and high pressure and
high temperature (HPHT), and the rough crystals produced are
different in shape.
CVD (Chemical Vapor Deposition) diamond is based on a loose natural
diamond stone as the parent stone, using high-purity methane, plus
hydrogen, nitrogen and other gases to assist, in a microwave oven
at high pressure to make methane the same carbon as diamonds
Molecules continue to accumulate on the rough diamond, and after a
layer of proliferation, a transparent diamond as large as 10 carats
can be formed.
Another commonly used method for cultivating diamonds is "HPHT"
(high temperature and high pressure synthesis), which uses iron,
nickel and other metal elements as catalysts to simulate the
temperature and pressure environment produced by natural diamonds
for crystal growth.
High temperature and high pressure (HPHT) diamond planting
technology
As the first generation of diamond growth technology, high
temperature and high pressure technology can completely simulate
the growth process of natural diamonds, reproduce the reaction of
the carbon layer on the ground, and convert graphite into diamonds.
The growth of HPHT synthetic diamonds takes place in a small
chamber of the device, which generates high pressure. In the
nacelle, the raw material of diamond powder is dissolved in the
molten metal flux and then crystallized on the seed crystal to form
a synthetic diamond crystal. The crystallization process takes
several weeks to a month or more to form one or more crystals.
However, most of the synthetic diamonds produced by this method
cannot reach gem level, and are usually used in drilling, cutting,
aerospace, electronics, heat exchange and other fields.
At present, the popular high-temperature and high-pressure
synthetic diamond equipment in the world mainly includes two side
tops (belt, mainly popular in European and American countries), six
side tops (unique to China) and strip split ball (Russia) or
improved split ball (Gemesis company).
Parameters of Lab Made HPHT Rough Diamonds
| Lab Made HPHT Rough Diamonds Details |
| Brand Name | Yuda Crystal |
| Name | Lab Made HPHT Rough Diamonds |
| Diamond Color | D-F |
| Diamond Clarity | VS-SI |
| Diamond Carat Weight | 3.0ct - 4.0ct |
| Diamond Cut | Uncut |
| Technology | HPHT |
| Size | 5.0-15.0mm |
| Shape | Raw |
| 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 |
| M.O.Q | Negotiable |
| Diamond Type | Synthetic(lab created) |
| Location | Zhengzhou, China |
| Treatments Applied | None |
| 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 Made HPHT 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 |
| Guaranteed Conflict-Free | No | Yes |
| Hardness (MOHS) | 10 | 10 |
| SP3 Carbon Diamond Bonds (%) | 100% | 100% |
| Internal Crystal Structure | Face-Centered Cubic | Face-Centered Cubic |
| Hardness Comparable | 2.42 | 2.42 |
| Relative Diversity | 3.52 | 3.52 |
| Color Diffusion | 0.044 | 0.044 |
| Color | Various Grades | K to D grades |
| Price | $$$$$ | $$$ |
Lab Made HPHT Rough Diamonds Details
