0.40ct 0.50ct 1.0ct D-E-F Color VVS VS SI Clarity HPHT CVD Diamonds
Loose Diamonds
HPHT CVD Diamonds Description
Lab Grown Diamonds, also known as man made diamonds, cultured
diamonds and lab created diamonds, are grown in a highly controlled
laboratory environment using advanced technology.
Although laboratory-grown diamonds are formed in different
environments and conditions from natural diamonds, both natural
diamonds and lab diamonds are crystals composed of pure carbon, and
the physical properties, chemical properties, crystal structure and
optical properties of the two are the same. Both lab grown diamonds
and mined diamonds are real diamonds.
Can we distinguish between laboratory grown diamonds and natural
diamonds?
Yes it is. However, only diamond professionals can identify the
difference between laboratory grown diamonds and natural diamonds
by using professional diamond identification equipment.
HTHP and CVD are the two main methods for making laboratory-grown
diamonds.
High temperature and high pressure method (HTHP) uses graphite as
raw material. HPHT diamonds are manufactured at a pressure of 5-6
GPA (approximately the pressure produced by a commercial jet
landing on a human fingertip) and a temperature of 1300-1600°C.
CVD diamonds come from various gases, such as methane. They are
stored in a vacuum chamber, which decomposes the molecules of the
gas, and then these molecules gather on the pre-existing diamond
seeds.
Parameters of HPHT CVD Diamonds
| Lab Grown Diamonds Details |
| Brand Name | Yuda Crystal |
| Name | Lab Grown Melee Diamonds |
| Diamond Color | DEF |
| Diamond Clarity | VVS-SI |
| Diamond Carat Weight | 0.4-1.0 carat |
| Diamond Cut | Excellent, Very Good,Good |
| Polish | Excellent, Very Good,Good |
| Symmetry | Excellent, Very Good,Good |
| Technology | HPHT |
| Size | 4mm - 7mm |
| Shape | Round |
| Diamond Enhancement | None |
| Available Type | HPHT |
| Diamond Certificate | None |
| Application | Jewelry Decorations Rings Earring Necklace |
| 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) |
HPHT CVD 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 | $$$$$ | $$$ |
HPHT CVD Diamonds Details
