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{"title":"6.0Ct Up Lab Created Diamonds Square EFG Color HPHT Rough Diamonds","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/25\/57\/0738d149a518d8ccc80c8954a327-200x200-1\/6_0ct_up_lab_created_diamonds_square_efg_color_hpht_rough_diamonds.jpg","attrs":{"Brand Name":"Yuda Crystal","Model Number":"YD-HPHT","Certification":"None","Place of Origin":"Zhengzhou, China"}}
{"title":"Rectangular DEF Color 8.0 9.0 Carat HPHT Rough Diamonds For Enagement Ring","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/74\/ad\/56ecb4cc6f8ff682d327d94f3b5f-200x200-1\/rectangular_def_color_8_0_9_0_carat_hpht_rough_diamonds_for_enagement_ring.jpg","attrs":{"Brand Name":"YUDA CRYSTAL","Model Number":"YD-A+","Certification":"None","Place of Origin":"Zhengzhou, China"}}
{"title":"VS SI 3.0ct 4.0ct 5.0ct HPHT Rough Diamonds Custom For 1 Carat Loose Diamond","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/75\/47\/f79ddc9c13ca1fb3a741f14a8c10-200x200-1\/vs_si_3_0ct_4_0ct_5_0ct_hpht_rough_diamonds_custom_for_1_carat_loose_diamond.jpg","attrs":{"Brand Name":"YUDA CRYSTAL","Model Number":"YD-A+","Certification":"None","Place of Origin":"Zhengzhou, China"}}
{"title":"VS Plus 7.0 Carat 8.0 Carat HPHT Rough Diamonds Raw Unpolished Diamond For 2ct","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/09\/7b\/21e9e3f06aa4fcaaf2266ff578b0-200x200-1\/vs_plus_7_0_carat_8_0_carat_hpht_rough_diamonds_raw_unpolished_diamond_for_2ct_ring.jpg","attrs":{"Brand Name":"YUDA CRYSTAL","Model Number":"YD-A+","Certification":"None","Place of Origin":"Zhengzhou, China"}}
{"title":"EFG Color 10mm 12mm HPHT Diamond Lab Grown 8ct 12ct For DEF Loose Diamond","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/59\/d2\/a735d93087ea080bf6333dfaa1cf-200x200-1\/efg_color_10mm_12mm_hpht_diamond_lab_grown_8ct_12ct_for_def_loose_diamond.jpg","attrs":{"Brand Name":"YUDA CRYSTAL","Model Number":"YD-A+","Certification":"None","Place of Origin":"Zhengzhou, China"}}
{"title":"Square VS 10.0 Carat 11.0 Carat HPHT Rough Diamonds Pure Uncut Diamonds For","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/95\/62\/e5cc9e852d40487ffbedebfe4f03-200x200-1\/square_vs_10_0_carat_11_0_carat_hpht_rough_diamonds_pure_uncut_diamonds_for_jewelry.jpg","attrs":{"Brand Name":"YUDA CRYSTAL","Model Number":"YD-A+","Certification":"None","Place of Origin":"Zhengzhou, China"}}
{"title":"Rectangular 7mm 9mm DEF Color HPHT Rough Raw Diamond For Ring","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/5b\/c0\/32760dfd755d61f41abf74031d9e-200x200-1\/rectangular_7mm_9mm_def_color_hpht_rough_raw_diamond_for_ring.jpg","attrs":{"Brand Name":"YUDA CRYSTAL","Model Number":"YD-A+","Certification":"None","Place of Origin":"Zhengzhou, China"}}
6.0Ct Up Lab Created Diamonds Square Shape Lab Diamonds EFG Color HPHT Rough Diamonds
Lab Created Diamonds Description
Cultivated diamond is synthesized by artificial simulation of natural diamond crystallization conditions and growth environment, and natural diamond has exactly the same physical, chemical and optical properties. Production time is perhaps the biggest difference between the two types of diamonds, with natural diamonds taking hundreds of millions of years to form and cultured diamonds taking just a few weeks to produce.
Scientists have mastered how to grow a diamond in a laboratory, which is much cheaper than mining natural diamonds.
1. High pressure high Temperature method (HPHT)
Growing diamonds requires an indispensable element: carbon (C). In the process of growing HPHT diamonds, pure carbon powder is compressed into a growth capsule and then placed in a incubation chamber at pressures of 5-6 gpa and extremely high temperatures (up to 1300-1600°C) day in and day out. Eventually the carbon atoms join together to form a diamond crystal. Many large diamonds over 10 carats can be produced in one go in less than two weeks.
2.Chemical vapor Deposition (CVD)
Breeding process of chemical vapor deposition method is as follows: first, place a piece of diamond chips in a vacuum box, the next in the chamber filled with a mixture of hydrogen and methane gas, the gas provides a carbon atom, under the pressure of certain heating, until the gasification of carbon atoms on the thin layers and layers of sedimentary, like rain, forming uniform diamond coating. It takes nearly a month to grow a one-carat CVD diamond crystal.
Lab grown & natural diamonds
lab grown diamonds
natural diamonds
grown in a lab
mined from the earth
created in months
created over billions of years
offer incredible value
prized for their rarity
Specification
Item
Value
Brand name
Yuda Crystal
Model number
YuDa-CVD Diamond
Place of origin
Henan,China
Usage
Jewellery,rings,for polished
Hardness
10 Moh's
Payment term
100% payment in advance
Shipping ways
DHL,FEDEX,UPS.EMS
Delivery Time
3-14 Working Days Base on Order Quantity
Are lab created diamond Real?
Sure. There is no obvious difference between the Lab Grown Rough 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. Who are we? Henan YuDa Crystal Co., Ltd. are based in ZhengZhou city.We are specialized in the export and import business of lab grown diamonds more than 10 years. YuDa is a professional company in all synthetic diamond applications, our main products are cvd diamond, hpht diamond, and customized diamond by your requirements. Our products enjoy a good reputation and are sold to Europe, America, Southeast Asia, South Africa and other countries and regions. FAQ
Q:Do you provide samples? Is it free or not? A: Yes, we provide samples,but not for free. Q:What are your terms of payment? A: We accept Paypal,T/T,Western Union and MoneyGram. Q: Which express company do you use? A: As usual we used DHL,UPS ,FEDEX Or Brinks.
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 ...
