Henan Yuda Crystal Co.,Ltd
| Payment Terms | 100% Payment In Advance |
| Supply Ability | 50000carats per month |
| Delivery Time | 1-15 Working Days Depends On Quantity |
| Packaging Details | Carton box |
| Product Name | HPHT Rough Diamonds |
| Brand | Yuda Crystal |
| Grade | High |
| Assortment | Good |
| Color | DEF |
| Clarity | VVS VS SI |
| Carat Weight | 0.2ct - 0.6ct |
| Cut | Uncut |
| Technology | HPHT |
| Shape | Rough, Raw |
| Usage | For Cutting Lab Grown Polished Diamonds |
| Component | Carbon |
| Hardness | Moh's 10 Scale |
| Available Type | HPHT, CVD |
| Place Of Origin | Zhengzhou, China |
| Payment Mode | T/T, Bank Transfer, PayPal, Western Union |
| Courier | DHL, FedEx, UPS, TNT, EMS etc |
| Packaging | As Export Standard |
| Customization | Welcome |
| Polish | None |
| Symmetry | None |
| Sample Order | Welcome |
| Treatments Applied | None |
| Enhancement | None |
| Brand Name | YUDA CRYSTAL |
| Model Number | YD-A |
| Certification | None |
| Place of Origin | Zhengzhou, China |
View Detail Information
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Product Specification
| Payment Terms | 100% Payment In Advance | Supply Ability | 50000carats per month |
| Delivery Time | 1-15 Working Days Depends On Quantity | Packaging Details | Carton box |
| Product Name | HPHT Rough Diamonds | Brand | Yuda Crystal |
| Grade | High | Assortment | Good |
| Color | DEF | Clarity | VVS VS SI |
| Carat Weight | 0.2ct - 0.6ct | Cut | Uncut |
| Technology | HPHT | Shape | Rough, Raw |
| Usage | For Cutting Lab Grown Polished Diamonds | Component | Carbon |
| Hardness | Moh's 10 Scale | Available Type | HPHT, CVD |
| Place Of Origin | Zhengzhou, China | Payment Mode | T/T, Bank Transfer, PayPal, Western Union |
| Courier | DHL, FedEx, UPS, TNT, EMS etc | Packaging | As Export Standard |
| Customization | Welcome | Polish | None |
| Symmetry | None | Sample Order | Welcome |
| Treatments Applied | None | Enhancement | None |
| Brand Name | YUDA CRYSTAL | Model Number | YD-A |
| Certification | None | Place of Origin | Zhengzhou, China |
| High Light | 2pcs HPHT Rough Diamond ，HPHT Rough Diamond 0.2ct ，0.6ct Laboratory Made Diamonds | ||
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
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Exporter,Seller
Year Established:
2016
Total Annual:
50 Million-200 Million
Employee Number:
10~50
Ecer Certification：
Verified Supplier
Yuda Crystal is one of the world's leading lab grown diamond companies, mainly active in fields: Gem quality lab grown rough(Including HPHT and CVD) diamonds manufacturing and wholesale, lab grown polish diamonds manufacturing and wholesale, Industrial grade HPHT and CVD lab grown diamonds ... Yuda Crystal is one of the world's leading lab grown diamond companies, mainly active in fields: Gem quality lab grown rough(Including HPHT and CVD) diamonds manufacturing and wholesale, lab grown polish diamonds manufacturing and wholesale, Industrial grade HPHT and CVD lab grown diamonds ...
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