Henan Yuda Crystal Co.,Ltd
| Payment Terms | 100% Payment In Advance |
| Supply Ability | 50000carats per month |
| Delivery Time | 1-7 Working Days Depends On Quantity |
| Packaging Details | Carton box |
| Product Name | Synthetic Rough Uncut Diamond |
| Brand | Yuda Crystal |
| Grade | High |
| Diamond Color | DEF |
| Diamond Clarity | VVS VS SI |
| Diamond Carat Weight | 3-5ct |
| Diamond Cut | Uncut |
| Technology | HPHT |
| Diamond Shape | Round |
| Usage | For Jewellery |
| Component | Carbon |
| Hardness | Moh's 10 Scale |
| Available Type | HPHT |
| Place Of Origin | Zhengzhou,Henan,China |
| Payment Mode | T/T, Bank Transfer, PayPal, Western Union |
| Courier | FedEx, DHL, UPS, TNT, EMS etc |
| Customization | Welcome |
| Polish | None |
| Sample Order | Welcome |
| Treatments Applied | None |
| Brand Name | YUDA CRYSTAL |
| Model Number | A+ A |
| Certification | None |
| Place of Origin | Zhengzhou,Henan,China |
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Product Specification
| Payment Terms | 100% Payment In Advance | Supply Ability | 50000carats per month |
| Delivery Time | 1-7 Working Days Depends On Quantity | Packaging Details | Carton box |
| Product Name | Synthetic Rough Uncut Diamond | Brand | Yuda Crystal |
| Grade | High | Diamond Color | DEF |
| Diamond Clarity | VVS VS SI | Diamond Carat Weight | 3-5ct |
| Diamond Cut | Uncut | Technology | HPHT |
| Diamond Shape | Round | Usage | For Jewellery |
| Component | Carbon | Hardness | Moh's 10 Scale |
| Available Type | HPHT | Place Of Origin | Zhengzhou,Henan,China |
| Payment Mode | T/T, Bank Transfer, PayPal, Western Union | Courier | FedEx, DHL, UPS, TNT, EMS etc |
| Customization | Welcome | Polish | None |
| Sample Order | Welcome | Treatments Applied | None |
| Brand Name | YUDA CRYSTAL | Model Number | A+ A |
| Certification | None | Place of Origin | Zhengzhou,Henan,China |
| High Light | Uncut HPHT Lab Grown Rough Diamond ，DEF Color Lab Grown Rough Diamond ，Hpht Lab Created 3 Carat Diamond | ||
DEF Color Uncut 3.0ct 5.0ct Rough Diamond HPHT Lab Grown Diamonds VVS VS SI Clarity
Lab Created Diamonds Description
Lab grown diamond, also known as artificial diamond, artificial diamond, is produced in the laboratory of diamond, and natural diamond in chemical composition, lattice structure, physical properties are completely the same.
Lab grown diamond is artificially simulated natural diamond growth environment synthetic diamond, using high temperature and high pressure method (HTHP method) and CVD method (chemical vapor precipitation method) synthesis, also known as grown diamond. Laboratory breeding is real diamonds, physical properties, chemical composition and crystal structure and natural diamond basic same, both share 4 c certification standard, has been appraised by IGI, GIA and other international authoritative institutions issued certificate.
Production of natural rough diamonds has been declining in recent years, but global demand for diamonds has been increasing. Supply and demand imbalance for laboratory made diamond creates opportunity.
With the progress of human technology, scientists have to transfer natural diamond to the laboratory environment, the use of high pressure high temperature (HPHT) to simulate the diamond growth environment, with the size of gravel diamond for seeds to grow.
Parameters of Lab Created Diamonds
| HPHT Lab Grown Diamonds Details | |
| Brand Name | Henan Yuda Crystal |
| Name | Rough Uncut Diamonds |
| Color | D-F |
| Clarity | VVS-SI |
| Carat Weight | 3.0-5.0 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 low voltage stabilization, and diamond (diamond mineralogy name) is a high pressure stable phase. Graphite transition to diamond directly to high pressure and temperature conditions, generally take 10 gpa, pressure and temperature of more than 3000 ℃. If metal catalysts (such as Fe, Ni, Mn, Co and their alloys) are involved, the temperature and pressure conditions required for graphite to become diamond will be greatly reduced, so the current high temperature and high pressure diamond synthesis methods all involve metal catalysts. As solvent metal contact coal in carbon source (a graphite) between seeds and diamond products. Carbon source at high temperature end, seed crystal at low temperature end. As carbon source in high temperature and the solubility is greater than the low temperature, temperature difference between the solubility difference as carbon source from high end to low end the spread of the driving force, the carbon source in the seed crystal precipitation gradually, the diamond crystals grow. Since the driving force of crystal growth is caused by temperature difference, this method is also called 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.
| 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 | $$$$$ | $$$ |
Lab Created 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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