4pcs 3pcs 2pcs HPHT Rough Diamonds For Making Small Sizes Lab Grown
Loose Diamonds
HPHT Rough Diamonds Description
How is the diamond production process in the laboratory?
Man-made diamonds do not need to be produced under the conditions
of high temperature and pressure inside the earth like natural
diamonds, nor do they need extreme events such as volcanic
eruptions or meteorites hitting the earth. It grows in a mild
environment in a ground laboratory.
Everything starts with the seed. The seed is a small laboratory
diamond that can be processed by one of two methods: CVD (chemical
vapor deposition) or HPHT (high temperature and high pressure). In
chemical vapor deposition (CVD), the seed is placed in a plasma
reactor chamber, and then a carbon-rich gas mixture is added to the
seed under extremely low pressure. Then microwaves are used to heat
the gas and generate plasma. When the temperature rises by several
thousand degrees Celsius, the gas molecules decompose and the
carbon atoms are combined with the seeds. Its operation process is
to put a small piece of diamond as the mother stone ("seed
diamond") into the reactor, then fill the reactor with methane, and
then turn on electricity. The methane molecules are then ionized,
forming a plasma. This plasma contains a large number of carbon
atoms, which continuously accumulate on the diamond mother crystal
like rain. After layer by layer, artificial diamonds composed of
pure carbon atoms are formed.
High pressure and high pressure (HPHT) mimics the formation process
of natural diamonds, placing the seeds under great mechanical
pressure and exerting great pressure and high temperature on the
existing carbon. The seed will quickly turn into a diamond with a
carbon lattice and grow layer by layer within a few days until it
reaches the desired carat weight.
Its essence is the ordinary crystal growth method, called "chemical
vapor deposition method" (referred to as CVD method), the English
full name is Chemical Vapor Deposition.
Parameters of HPHT Rough Diamonds
| HPHT Rough Diamonds Details |
| Brand Name | Yuda Crystal |
| Name | HPHT Rough Diamonds |
| Diamond Color | D-F |
| Diamond Clarity | VVS-SI |
| Diamond Carat Weight | 0.25-0.60 carat |
| Diamond Cut | Uncut |
| Technology | HPHT |
| Size | 3.0-5.0mm |
| 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) |
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 Rough
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 Rough Lab Grown Diamonds and
natural diamonds?
There is no obvious difference between the Rough 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 Rough Diamonds Details
