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3Ct 4Ct 5Ct Big Rough Diamonds VS SI Gem Quality 5mm To 20mm For Jewelry

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: DEF Clarity: VS SI
Carat Weight: 3.0-5.0ct 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 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:

5Ct Big Rough Diamonds


4Ct big rough diamonds VS SI


3Ct gem quality rough diamonds

Product Description

3 Carat 4 Carat And 5 Carat Big Size Gem Quality Rough Lab Grown Diamonds VS SI Purity


Rough Lab Grown Diamonds Description


1. What is cultivating diamond?
Diamond is cultivated in the laboratory, the advanced technology is used to simulate the environment of natural diamond formation in the equipment, and the diamond crystal is used as seed to induce diamond crystal growth. The physical and chemical properties of cultivated diamonds are the same as those of natural diamonds. With the progress of science and technology, the purity and color of cultivated diamonds are getting higher and higher, which can be used for jewelry.
At present, there are two main methods to produce and cultivate diamonds on the market: high temperature and high pressure method, referred to as HPHT; chemical vapor deposition, referred to as CVD.
Nowadays, the large carat cultivation diamond growth technology has realized the mass production of white, yellow, blue, green, purple red and other color cultivation diamonds. The color of white diamonds can reach D-E level and the clarity can reach vvs-si level.

2. Is it easy to distinguish cultivated diamond from natural diamond?

Many people have similar doubts: since diamonds can be cultivated artificially, can they be mixed with natural diamonds? If I want to buy natural diamonds, will I buy cultivated diamonds at the price of natural diamonds?
In fact, there is no need to worry about this. Now the quality inspection institutions use professional instruments to test the diamonds. By comparing the crystal shape, internal growth characteristics, inclusion characteristics, absorption spectrum, cathodoluminescence and other aspects of the tested diamonds, they can completely distinguish cultivated diamonds from natural diamonds. After all, natural diamonds are formed in a relatively stable environment deep underground for a long time. Natural diamonds have a long history, and the youngest diamonds are billions of years ago. However, it only takes a few weeks or even days to cultivate diamonds. There are subtle differences in the growth environment between the two, which can be distinguished by professional detection methods.


Parameters of Rough Lab Grown Diamonds


Rough Lab Grown Diamonds Details
Brand Name Yuda Crystal
Name Rough Lab Grown Diamonds
Diamond Color D-F
Diamond Clarity VVS VS SI
Diamond Carat Weight 3.0-4.0ct, 4.0-5.0ct
Diamond Cut Uncut
Technology HPHT
Size 5.0-20.0mm
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)



Rough 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 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 $$$$$ $$$



Rough Lab Grown Diamonds Details


3Ct 4Ct 5Ct Big Rough Diamonds VS SI Gem Quality 5mm To 20mm For Jewelry 0

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