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 | Man Made Rough Diamonds |
| Brand | Yuda Crystal |
| Grade | High |
| Assortment | Good |
| Color | DEF |
| Clarity | VVS VS |
| Carat Weight | 4.0-5.0ct |
| 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 | Man Made Rough Diamonds | Brand | Yuda Crystal |
| Grade | High | Assortment | Good |
| Color | DEF | Clarity | VVS VS |
| Carat Weight | 4.0-5.0ct | 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 | VVS VS Man Made Diamonds ，5.0ct DEF man made diamonds ，4.0ct human made diamonds | ||
4.0-5.0ct DEF Color VVS VS Clarity Man Made Rough Diamonds For Making 2 Carat Loose Diamonds
Man Made Rough Diamonds Description
Synthetic diamonds are made via HPHT or CVD methods nowadays.
High temperature and high pressure technology fully simulates the growth process of natural diamond, reproduces the reaction of carbon layer on the ground and converts graphite into diamond. High temperature and high pressure method is also called seed catalyst method. Graphite is a low pressure stable phase, and diamond is a high pressure stable phase. The transformation from graphite to diamond requires very high pressure and temperature conditions, which generally requires a pressure and temperature of 10 GPa and above 3000℃. If there are metal catalysts (such as Fe, Ni, Mn, CO and their alloys), the temperature and pressure conditions required for graphite to become diamond will be greatly reduced. Therefore, metal catalysts are involved in the synthesis of diamond by high temperature and high pressure method at present. As a solvent, the metal catalyst is between the carbon source (usually graphite) and the diamond seed. The carbon source is at the high temperature end and the seed crystal is at the low temperature end. Because the solubility of the carbon source at the high temperature end is greater than that at the low temperature end, the solubility difference caused by the temperature difference becomes the driving force for the diffusion of the carbon source from the high temperature end to the low temperature end. The carbon source gradually precipitates at the seed crystal and the diamond crystal grows up gradually. Because the driving force of crystal growth is caused by temperature difference, this method is also called temperature difference method.
Synthetic diamonds usually have no fluorescence under long wavelength ultraviolet, but yellow, green yellow and orange yellow fluorescence under short wavelength. Synthetic diamonds have characteristic banding phenomenon under ultra short wavelength ultraviolet or cathode ray, and different growth areas show different color fluorescence banding.
Parameters of Man Made Rough Diamonds
| Man Made Rough Diamonds Details | |
| Brand Name | Yuda Crystal |
| Name | Man Made Rough Diamonds |
| Diamond Color | D-F |
| Diamond Clarity | VVS-SI1 |
| Diamond Carat Weight | 4.0-5.0 carat |
| 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) |
Man Made 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 | $$$$$ | $$$ |
Man Made 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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