CVD-mono crystal diamond for jewellery

 CVD mono-crystal rough diamond for jewellery use

Features:

1, Size:D6-10mm, H3.5-6.6mm

2, Weight: 0.5carat to 5carat as per your need.

2, Color: D-G

3, Clarity: VS-VVSI similar with natural stones inner structure, no metal shinning light.

4,Raman spectrum inspection: IIa, with no nitrogen inside.

Production process:

1 Choosing materials:nature diamond

    From small diamond grow into big size diamond.

2, Cut

   Laser cutting to get seeds.

3. polished

Fix with glue

Polish preparation

Machine plishing process

Comparasion for unpolish and polish ones.

4:pre-treatment

With an acid and acetone to remove surface impurities and to give the growth of the seed

   Pre-processing has been completed, in order to get good growth results, the following isdiamond process of growing up

5. Put in machinery with enviroment super clean. 

The rubber suck using for not to damage the surface atomic structure of diamond

6. growth:

Control steadly for growth data: temperature, pressure, air flow, power etc.

 Vacuum cavity growth, diamonds continue to grow in the plasma (plasma) ball 

The shape after two weeks growth.               

This is, after growth of shape, since the growth rate of each long sideis not the same, so the need for face grewup, and inhibit the growth of both sides, but there are other factors in the growth process inevitably, all sides have grownin different directions, requiring furtherprocessing

Growth process picture

7. treatment

Mainly for laser cutting

7, polish

8,  cut

9, finished cvd polished diamond

Q: Are you trading company or manufacturer ?
A: We have two company name, TKD Co., Ltd is our factory name,  Henan Precision Diamond Co., Ltd is our sister company selling all TKD brand items.

Q: How long for production time ?
A: Generally it is 5-7 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.

Q: Do you provide samples ? is it free or extra ?
A: it depends, we could offer the small items for sample for free charge but do not pay the cost of freight.

Q: What is your terms of payment ?
A: Payment<=5000USD, 100% in advance. Payment>=5000USD, 50% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us:

Henan Precision Diamond Co., Ltd

EMAIL: Please find in CONTACT US

TEL: 86-371-86171582

Skype: Margaret.tkd