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35ct 1.4mm 2.0mm Rough Lab Grown Diamonds For Star Melee Diamonds

Minimum Order Quantity : Negotiate Price : Negotiate
Packaging Details : Carton box Delivery Time : 3-7 working days
Payment Terms : T/T, Western Union Supply Ability : 50000carats per month
Place of Origin: Zhengzhou, China Brand Name: YUDA CRYSTAL
Certification: None Model Number: YD-A+

Detail Information

Product Name: Rough Lab Grown Diamonds Brand: Yuda Crystal
Grade: High Assortment: Good
Color: DE Clarity: VVS VS
Carat Weight: 35 Size 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 Terms: 100% Payment In Advance
Payment Mode: T/T, Bank Transfer, PayPal, Western Union Delivery Time: 1-15 Working Days Depends On Quantity
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
High Light:

2.0mm Rough Lab Grown Diamonds


1.4mm Rough Lab Grown Diamonds


35ct Star Melee Diamonds

Product Description

35pcs Size DE Color Rough Lab Grown Diamonds For Cutting Star Melee Diamonds


Rough Lab Grown Diamonds Description


The word "diamond" comes from the Greek adamas, which means indestructible. Indeed, diamonds are the hardest material in nature.
Lab-grown rough diamonds are synthesized in a few weeks, while the development of natural diamonds takes billions of years. Since the 1950s, people have begun to produce cultivated diamonds for industrial purposes, and they have been widely used in telecommunications, laser optics, medical care and other fields. In 1970, General Electric produced the first very small gem-quality cultivated diamond that could be faceted like a gem.

By the mid-1980s, other manufacturers were able to produce cultivated diamonds. At first, these cultivated diamonds were almost all small and yellow, but the quality of cultivated diamonds continued to improve. Nowadays, both colorless and colored gem-grade cultivated diamonds are used in jewelry.

In the laboratory, there are two main processes for the manufacture of lab grown rough diamonds.

1. High pressure and high temperature (HPHT)

Using this method to make rough laboratory-grown diamonds, the laboratory simulates the high temperature and pressure conditions of natural diamonds when they are formed underground. HPHT diamonds are manufactured at a pressure of 5-6 GPA (approximately the pressure produced by a commercial jet landing on a human fingertip) and a temperature of 1300-1600°C.
Low-quality natural diamonds and unprocessed natural diamonds can be processed through the HPHT process to improve color and clarity. In addition to increasing the color grade of colorless diamonds, this process can also be used to change the color of the diamond to pink, blue, or yellow.

2. Chemical Vapor Deposition (CVD)
Using this relatively new technology, scientists are able to manufacture synthetic diamonds at moderate temperatures (700°C to 1300°C) and low pressures. The carbon-containing gas is pumped into the vacuum chamber, deposited on the diamond seed, and crystallized into rough laboratory-grown diamonds. The final size of the diamond depends on the time allowed to grow.


Parameters of Rough Lab Grown Diamonds

Rough Lab Grown Diamonds Details
Brand Name Yuda Crystal
Name Rough Lab Grown Diamonds
Diamond Color D-E Full White Color
Diamond Clarity VVS-VS
Diamond Carat Weight Average around 0.03 carat
Diamond Cut Uncut
Technology HTHP
Size 1.4 - 2.0mm
Shape Raw
Application For Cutting Lab Grown Melee 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)



Lab Grown 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 element between the two is same.

So how do you distinguish between lab 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 $$$$$ $$$


Rough Lab Grown Diamonds Details


35ct 1.4mm 2.0mm Rough Lab Grown Diamonds For Star Melee Diamonds 0


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