Home ProductsHPHT Lab Grown Diamonds

4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds

Certification
China Henan Yuda Crystal Co.,Ltd certification
China Henan Yuda Crystal Co.,Ltd certification
Customer Reviews
YUDA CRYSTAL IS FOREVER

—— Nilesh

Superb

—— Rajesh

I'm Online Chat Now

4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds

4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds
4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds 4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds 4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds 4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds

Large Image :  4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds

Product Details:
Place of Origin: Zhengzhou, China
Brand Name: Yuda Crystal
Certification: None
Model Number: RBC
Payment & Shipping Terms:
Minimum Order Quantity: Negotiate
Price: Negotiate
Packaging Details: Carton box
Delivery Time: 1-7 working days
Payment Terms: T/T, Western Union, PayPal, Bank Transfer
Supply Ability: 50000carats per month

4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds

Description
Product Name :: HPHT Lab Grown Diamonds Color: DEF
Clarity: VVS VS SI Carat Weight: 4-5 Carat
Technology: HPHT Usage: For Cutting Lab Grown Diamonds
Payment Terms: 100% Payment In Advance Payment Mode: T/T, PayPal,Bank Transfer, Western Union
Delivery Time: 1-7 Working Days Depends On Quantity Courier: DHL, UPS, FedEx, TNT, EMS Etc
Packaging: As Export Standard Hardness: Moh's 10 Scale
Shape: Round Cut: Uncut
High Light:

HPHT Uncut Raw Diamonds

,

5 Carat hpht rough diamond

,

4 Carat hpht rough diamond

4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds

 

Lab Created Diamonds Description

 

Lab-grown diamonds are also known as lab-made diamonds. There are two main methods to make the laboratory breeding diamond: CVD and HPHT.

 

Diamonds are considered the hardest material in the world. According to the Mohs hardness scale, it is divided into 10 grades, of which diamond is the highest grade. From the people know that diamond is composed of pure carbon that day, more and more people in laboratory breeding of high temperature and high pressure diamond were studied. At present, the laboratory raw high temperature and high pressure diamond industry develops rapidly and is widely used in various industries and processing industries.

High temperature and high pressure synthesis of diamond technology originated in the 1950 s, initially was applied in aviation and military industry, nearly 10 years to achieve a qualitative leap in technology, gem grade synthetic diamond both in quality and cost is up to the level of the market.

Artificial diamonds, often referred to as lab-grown HPHT diamonds, are created by mimicking the crystallization process of natural diamonds. Natural diamond to form in the natural environment, often mixed with other elements, which makes some natural diamonds are not completely transparent, will show the specific color. For example, some with a pink diamonds, some a bit blue, some with a light yellow. HPHT diamonds are grown in a laboratory and have fewer impurities than natural diamonds, so they are more pure and transparent.

Natural diamonds take millions of years to form. Before a volcano erupts, underground lava Wells about 150 to 200 kilometers deep can slowly cool in the crater, because the crater is often blocked. Pure carbon material pressure is 4.5 * 10 ^ 6 ~ 9 pa. When the temperature drops to 1000 ~ 1250℃, natural diamond crystals are formed. Deep inside the earth a few places have the physical and chemical conditions of forming the diamond.

However, under the condition of the natural growth of the production of natural diamond, can now be simulated in the laboratory, the use of high temperature and high pressure (HPHT) or chemical vapor deposition (CVD) techniques, in just a few weeks can produce the lab production of gem grade diamond.

 

 

Parameters Of Lab Created Diamonds

 

Product Name Synthetic (Lab created) diamond
Material Lab-grown
Color DEF
Shape Round
Technology HPHT
Diamond Cut Uncut
Payment Terms 100% Payment In Advance
Diamond Carat Weight 2CT-4CTS
Grade VVS VS SI
Shipping way DHL, FedEx, SF Express, UPS, EMS, TNT etc
M.O.Q Negotiable
Delivery Time 1-7 Working Days Depends On Quantity
Payment Methods T/T, PayPal, Western Union, Bank Transfer
Used Jewelry (necklace,ring,earring)
Application For Cutting Lab Grown Loose Diamonds
Place Of Origin Zhengzhou, China

 

Characteristics Of Lab Created Diamonds

 

Lab grown diamonds in the chemical, optical and structure are the same as the mining of diamonds. What does that mean?

 

The Difference Between Lab Diamond And Natural Diamond
Attribute Lab-Created Diamonds Natural diamond Distinction
Chemical composition C(carbon) C(carbon) No
Refractive index 2.42 2.42 No
Relative density 3.52 3.52 No
Dispersion 0.044 0.044 No
Hardness value 90 GPA 90 GPA No
Thermal conductivity 2*103 W/M/K 2*103 W/M/K No
Thermal property 0.8*10-6 K 0.8*10-6 K No
Light transmittance DEEP UV TO FAR TR DEEP UV TO FAR TR No

Resistivity

1016 OHM-CM

1016 OHM-CM

No

Compressibility

8.3*10-13 M2/N

8.3*10-13 M2/N

No

 

From a scientific point of view, synthetic diamond and natural diamond exactly the same, the only difference is that the formation of their location.

 

Lab Created Diamonds Details

4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds 0

Contact Details
Henan Yuda Crystal Co.,Ltd

Contact Person: Lucy

Tel: +8617746919865

Send your inquiry directly to us (0 / 3000)