Send Message
Home ProductsHPHT Rough Diamond

2.0ct DEF VVS VS HPHT Rough Diamond 2.5 Ct Lab Diamond

China Henan Yuda Crystal Co.,Ltd certification
China Henan Yuda Crystal Co.,Ltd certification
Customer Reviews

—— Nilesh


—— Rajesh

I'm Online Chat Now

2.0ct DEF VVS VS HPHT Rough Diamond 2.5 Ct Lab Diamond

2.0ct DEF VVS VS HPHT Rough Diamond 2.5 Ct Lab Diamond
2.0ct DEF VVS VS HPHT Rough Diamond 2.5 Ct Lab Diamond 2.0ct DEF VVS VS HPHT Rough Diamond 2.5 Ct Lab Diamond 2.0ct DEF VVS VS HPHT Rough Diamond 2.5 Ct Lab Diamond

Large Image :  2.0ct DEF VVS VS HPHT Rough Diamond 2.5 Ct Lab Diamond

Product Details:
Place of Origin: Zhengzhou, China
Certification: None
Model Number: YD-A+
Payment & Shipping Terms:
Minimum Order Quantity: Negotiate
Price: Negotiate
Packaging Details: Carton box
Delivery Time: 1-15 working days
Payment Terms: T/T, Western Union
Supply Ability: 50000carats per month

2.0ct DEF VVS VS HPHT Rough Diamond 2.5 Ct Lab Diamond

Product Name: HPHT Synthetic Diamond Brand: Yuda Crystal
Grade: High Assortment: Good
Color: DEF Clarity: VVS VS
Carat Weight: 2.0-2.5ct Cut: Uncut
Technology: HPHT Shape: Rough, Raw
Usage: For Cutting Lab Grown 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:

VVS VS HPHT Rough Diamond


2.0ct HPHT Rough Diamond


HPHT 2.5 ct lab diamond

2.0-2.5ct DEF Color VVS VS Clarity HPHT Rough Diamond For High Quality Lab Grown Diamonds Making


Lab Grown Rough Diamonds Description


The Lab Grown Diamonds are produced in the laboratory. The laboratory uses advanced technology and equipment to reduce the environment for the formation of natural diamonds. By using fine diamond seeds to induce natural diamond crystallization, Lab Grown Diamonds with the same physical, chemical and optical properties as natural diamond can be cultivated on the ground. So the Lab Grown Diamonds in the lab are real diamonds.

Lab Grown Diamonds are 100% real diamonds and 100% eco-friendly diamonds. It's very cost effective and more affordable.


What is CVD diamond?


CVD stands for "chemical vapor deposition" system.


The CVD system starts with diamond seed. Diamond seed is a kind of small natural diamond fragment which can withstand extreme temperature and pressure. In the process of chemical vapor deposition, the vacuum chamber where the diamond "seed" is located is filled with gases with high carbon content, and then heated to a high temperature much higher than 1000 degrees, and these gases are transformed into "plasma"

For those of us who don't know, plasma is to help "build" diamond layers and make them lovely gems. We know and love them very much.


What is HPHT diamond?

HPHT stands for high pressure and high temperature. In order to grow high performance high temperature diamond, a small diamond seed was put into carbon, that is element the diamond is made of diamond. Diamond seeds are exposed to extreme heat and pressure to replicate diamonds in a natural way. They grow underground. Diamond seeds exposed above 1100 degrees, pressure about 1.5 million Pounds per square inch. The carbon melts around the seeds and forms diamonds. Then it cools and the diamond forms.


Chemical vapor deposition (CVD) is a method to grow diamond from hydrocarbon gas mixture. The flexibility and simplicity of CVD devices explain the popularity of CVD growth in laboratory research. The advantages of CVD diamond growth include the ability to grow diamond on large area and different substrates, as well as the fine control of chemical impurities and properties of the diamond.

The growth of CVD involves the preparation of substrates, injecting different amounts of gases into a chamber and energizing them. The substrate preparation includes selecting suitable materials and crystal orientation; When cleaning, diamond powder is often used to grind non diamond substrate; Optimized substrate temperature (about 800 ℃) In the growth process, through a series of test run. These gases usually include a carbon source, usually methane, and a typical ratio of 1:99 hydrogen. Hydrogen is essential because it selectively corrodes non diamond carbon. These gases are ionized into chemically active radicals in the growth chamber by microwave power, hot filament, arc discharge, welding torch, laser, electron beam or other methods.


Parameters of Lab Grown Rough Diamonds

HPHT Lab Grown Diamonds Details
Brand Name Yuda Crystal
Name Rough Lab Grown Diamonds
Diamond Color D-F
Diamond Clarity VVS-VS
Diamond Carat Weight 2.0-2.5 carat
Diamond Cut Uncut
Technology HPHT
Size 5-10mm
Shape Raw
Application For Cutting Lab Grown Loose Diamonds
Place Of Origin Zhengzhou, China
Delivery Time 1 - 15 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 Rough Diamonds Introduction

HPHT is the abbreviation for high temperature and high pressure treatment, and its purpose is to change or improve the natural body color of certain types of diamonds to make them more valuable.

In the past, it was called Pegasus diamond and GE POL diamond. The reason why it is called GE Diamond is because The technology developed by GE in the United States is a new product exclusively sold by POL, a subsidiary of Israel's LKI, in 1999.

HPHT technology is to process natural diamonds at high temperature and high pressure to enhance the color grade of diamonds. In one move, it can be upgraded to 4-6 levels. However, not every diamond can be processed by this technology. It must have a J color or higher, and be free of impurities and high-clarity quality. During processing, the results cannot be predicted. In other words, it is not certain what level it can be promoted to.

At the same time, diamonds treated with HPHT may deepen or change in color to become a colored diamond.


Natural diamonds are created by nature and are the result of high temperature and pressure formed over billions of years. The Rough 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 Rough Lab Grown Diamonds and natural diamonds?

There is no obvious difference between the Rough 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 $$$$$ $$$


Lab Grown Rough Diamonds Details

2.0ct DEF VVS VS HPHT Rough Diamond 2.5 Ct Lab Diamond 0


Contact Details
Henan Yuda Crystal Co.,Ltd

Contact Person: Ms. Pang

Send your inquiry directly to us (0 / 3000)