CVD Diamond

CVD is the abbreviation of “Chemical Vapor Deposition” diamond processing technology


  • Carat : 0.5 ~ 8.0
  • Clarity : EX / VVS / VS
  • Color : E / F / G / H / I
  • Cut : Excellent / Very Good / Good

Lab grown diamonds have the same chemical, physical, and optical characteristics as natural diamonds.


CVD Diamond Technical  Data

Property Lab grown diamond Natural diamond Different
Chemical  composition Carbon Carbon NO
Refraction  Rate 2.42 2.42 NO
Relative density 3.52 3.52 NO
Dispersion 0.044 0.044 NO
Hardness 90GPa 90GPa NO
Thermal  performance 2 * 103 W/M/K 2 * 103 W/M/K NO
Thermal expansion properties 0.8 * 10-6 K 0.8 * 10-6 K NO
Light transmittance Deep UV to far IR Deep UV to far IR NO
Resistance rate 1016 Ohm(-cm) 1016 Ohm(-cm) NO
Compressible 8.3 * 1013  m2 /n 8.3 * 1013  m2 /n NO


Type band gap



coefficient of

thermal conductivity

λ / [W/(cm.K)]

breakdown field


En /  (MV/cm)



μ/ (cm2/Vs)

Diamond 5.5 22 10 3800 (Electron hole)

4500 (free electron)

SiC 3.27 4.9 3.0 1000 (free electron) 9.7
GaN 3.4 1.5 2.5 2000 (free electron) 8.9
Si 1.12 1.5 0.3 1400 (free electron) 11.8



The only difference between them is their origin.

                      Clean and tidy modern factory                                                              Destructive mining


CVD Diamond Extended information 

CVD diamond growth occurs within vacuum plasma reactors. Thin diamond plates are placed in a growth cell and hydrocarbon gas is injected into the reactor. High power microwaves break apart the molecules of the gas, and the carbon atoms precipitate onto the diamond plates, vertically growing the diamond atom by atom.

CVD diamond has exceptionally high transmission over a very broad range of wavelengths, low friction coefficient, good thermal conductivity, and chemically inert; making CVD diamond the optimal choice in applications demanding higher power, larger area, and resistance to hazardous materials or greater strength.


Products  Type


CVD diamonds include several different types.


1~ Industrial Grade


                     Single Crystal Type                                                              Optics Type


       N Concentration: <50ppm                                                                     Refractive Index of light: 1064 nm: 2.392

       Young Modulus: 1150~1300GPa                                                                                                     600nm: 2.415

       Friction Coefficient: 0.05~0.05                                                             Transmissivity of light:     1064nm: >68%

      Coefficient of Thermal Expansion: 10-6·K-1                                                                                    8μm~25μm: >70%

      Thermal Conductivity: 1500—2000 W/(m·K)


2 ~ Gem Grade (Rough diamond)

       Size: ≤9x9x6mm
       Colour: E-K
       Clarity: VVS – VS
       Carat: ≤8.0ct


As an experienced manufacturer, we know that high-quality products come from strict control of every detail in the production process.


1.  Quality raw materials are the first step to get a good product. High-purity methane and inert gas need to be carefully matched in proportion.



2.  The vacuum plasma reactor controls the temperature and pressure very carefully.


3.  Finally, we get a quality CVD diamond ( Raw diamond ).



Delivery time:

Sufficient Stock of various shapes, Carat, Clarity.  Delivery within 48 ~ 72 hours.


Packaging & Transport:

The diamond will be packed with a hard paper bag, carton, or as your requirement.

We will use the first-class international express company and all the goods are insured according to the full value of the goods.(DHL/UPS)


Direct from factory to customer, no middleman. 
Faster delivery, super quality, lower price, and better service. Been waiting for you.




Q1. What is your minimum for purchase?

A:  We don’t have a minimum. we accept any quantity of sample order.


Q2. What are your terms of payment?

A: We accept T/T, Western Union


Q3:  May tax or VAT cost to my order?

A:   If your purchase quantity small, we will transport it in the name of “private package”

If your purchase quantity a lot, we will use commercial parcel transportation.

However, The laws and taxes differ greatly from country to country. If you are not sure what the diamonds importing duties are in your country, we suggest contacting your country’s customs department for the most up to date information.


Q4:  How do you ship the goods and how long does it take to arrive?

A:   Yes, we have plenty of goods in stock, which can be delivered in 48 hours. If your order is large, We can confirm delivery within 5 ~10  working days.


Q5.  is it safe to receive a diamond in the mail?

A:   We will use the first-class international express company and all the goods are insured according to the full value of the goods.(DHL/UPS)

all shipments are insured for the full value of their contents.

SKU: JAK-01 Categories: CVD Diamond
The tags : |