4.0ct 5.0ct DEF VVS VS Full White HPHT Lab Grown Rough Diamond For
Loose Diamond
Synthetic Rough Uncut Diamonds Description
Laboratory growth of diamond, also called synthetic diamond,
synthetic diamond, diamond is produced in the laboratory, and
natural diamond on the chemical composition, lattice structure and
physical properties are exactly the same.
High temperature and high pressure (HPHT) and chemical vapor
deposition (CVD) is the most commonly used in synthetic diamond
industry white of the two methods of growth.
Laboratory growth diamond is simulating natural diamond synthetic
diamond growth environment, by using high temperature and high
pressure (HTHP) and CVD (chemical vapor phase precipitation)
synthesis, also called the diamond growth. Laboratory cultivation
is the real diamond, physical properties, chemical composition and
crystal structure of natural diamond is basically the same, all
share 4C certification standards, has been IGI, GIA and other
international authority certification issued by the certificate.
In recent years, the production of natural rough diamonds have been
falling, but the global demand for diamonds, has increased. The
imbalance between supply and demand creates opportunities for
lab-made diamonds.
With the progress of human technology, scientists will have to
natural diamond moved to the laboratory environment, the use of
high pressure high temperature (HPHT) to simulate the diamond
growth environment, with the size of the size of gravel for the
growth of diamond seed.
Parameters of Synthetic Rough Uncut Diamonds
| HPHT Lab Grown Diamonds Details |
| Brand Name | Henan Yuda Crystal |
| Name | Rough Uncut Diamonds |
| Color | D-F |
| Clarity | VVS VS |
| Carat Weight | 4.0-5.0 carat |
| Cut | Uncut |
| Technology | HPHT |
| Diamond Shape | Round |
| Application | For Jewellery(necklace,ring) |
| Place Of Origin | Zhengzhou,Henan,China |
| Delivery Time | 1 - 15 Working Days Base on Order Quantity |
| Payment Terms | 100% Payment In Advance |
| Payment Methods | PayPal,T/T, Western Union, Bank Transfer |
| Shipping way | DHL,SF Express, FedEx, UPS, EMS, TNT etc |
| M.O.Q | Negotiable |
| Diamond Type | Synthetic(lab created) |
| Location | Zhengzhou,Henan,China |
| 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) |
Synthetic Rough Uncut Diamond Introduction
High temperature and high pressure synthesis method is also called
seed catalyst method. Graphite is a low pressure stable phase,
while diamond (diamond mineralogy name) is a high pressure stable
phase. Graphite to diamond direct transition to high pressure and
high temperature conditions, generally take 10 gpa, pressure and
temperature above 3000 ℃. If involved metal catalysts (such as Fe,
Ni, Mn, Co and their alloys), graphite into diamond would
significantly reduce the required temperature and pressure
conditions, so the high temperature and high pressure diamond
synthesis method involves metal catalysts. Metal contact coal as
solvent between carbon source (graphite) seeds and diamond
products. Carbon source in the high temperature side, crystal seed
in low temperature. As the solubility of carbon source at high
temperature is greater than that at low temperature, temperature
difference acts as the driving force of carbon source diffusion
from high end to low end, and carbon source gradually precipitates
in seed crystal and diamond crystal gradually grows up. As the
driving force of the crystal growth is caused by temperature
difference, so this method is also referred to as the temperature
difference method.
Natural diamonds are created by nature, the result of billions of
years of high temperature and pressure. Laboratory of rough diamond
is produced in the laboratory, usually need a couple of weeks. The
chemical difference is the same.
So how do you distinguish between rough laboratory diamond and
natural diamond?
Unprocessed laboratory production of diamond and natural diamond
had no obvious difference. Even professional gemologists need
special equipment to identify them. By magnifying, professionals
will be able to recognize in the lab, growth and production of
diamond inclusions nuances.
| 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 |
| Compressibility | 8.3*10-13 M2/N | 8.3*10-13 M2/N |
| Hardness value | 90 GPA | 90 GPA |
| Price | $$$$$ | $$$ |
Synthetic Rough Uncut Diamonds Details
