1)CVD diamond film is mainly used in tools,heat sink,optical window,semiconductor,etc.Foreign companies such as E6,SP3,ADT,whether it is coated or diamond self-supporting film,all from 150 to 200 mm in diameter.Germany coating can reach 500-1000mm,and the diamond thick film is also mainly 200 mm in diameter.Sizes of 150,160,180 and 200 mm,thicknesses from 0.2 mm to 3 mm and coating up to 300 mm are produced by domestic diamond film manufacturers.The preparation methods used include Hot Filament,DC Arc Jet Plasma and Microwave Plasma,which are widely used in the industry.

　　2)CVD single crystal diamond,the current main market is jewelry,followed by high-end machining tools.In 2018,Element 6 invested nearly$100 million in the construction of a CVD single crystal diamond jewelry production line in the United States,priced at$800/carat.There are several factories in India that produce CVD single crystal diamond jewellery.Two of them have more than 500 Microwave equipment(including 2.45 GHz and 915 GHz).Germany has already put Microwave equipment into production scale in 2015,including 2.45 GHz and 915 GHz.Over the past decade,more than 30 research institutions and companies in China have been engaged in the research and development and production of CVD single crystal diamond jewelry,which has formed a brand and been sold in the market together with HPHT monocrystalline jewelry.There are already stores in Shanghai and Zhengzhou,and can be processed on site.

　　3)Gem-grade high-temperature and high-pressure diamond single crystal jewellery has been sold in the Chinese market for many years.And the main production countries in the world are Russia,Ukraine and the United States.The maximum weight after processing can reach 15 carats,which seriously impacts the natural diamond market and CVD single crystal diamond.After more than two years of rapid development in China,a large number of small and medium-sized enterprises were eliminated in the spring of 2018 due to the sharp price reduction and market reshuffle.In April 2018,Sino-Crystal Diamond raised￥4.5 billion for the gem-grade diamond project with an annual output of 7 million carats.At present,4-5 large enterprises have formed a monopoly in Henan.Since 2018,the monthly sales volume has been about 150,000 carats,and the weight of a single diamond is nearly 2 carats,posing a great threat to the diamond market.

　　In summary,the preparation of diamond film over 150mm and the production of carat grade diamond have become the basic forms of production,and the preparation of carat grade single crystal by CVD method and HPHT method is the most basic production mode at home and abroad.In 2016,the Ministry of Industry and Information Technology supported the 300,000-carat CVD single crystal diamond project.The basic investment and supporting equipment are at least 500 million yuan,which kicked off the large-scale production of CVD diamond single crystals in China.In 2018 alone,there were more than a dozen newly established companies in China to produce CVD diamond single crystal jewelry,adding more than 300 microwave equipment,imported from abroad(including 2.45 GHz and 915 GHz).The number of microwave equipment imported from abroad(including 2.45 GHz and 915 GHz)was nearly the same as that designed domestically.

　　People can already get diamonds corresponding to their economic strength from the market at any time.High temperature and high pressure commemorative diamonds are formed by using ashes,fetal hair,etc.,and CVD diamonds are synthesized by using biogas,coal-bed methane,etc.Everyone can enjoy a life as beautiful as a diamond.

　　With the improvement of CVD synthesis technology,through the adoption of gas raw material(hydrogen,methane),we get the completely transparent and colorless large size diamond single crystal under less than one air pressure,the temperature of 800-1200℃by epitaxial growth way,its composition,hardness,density,etc.are basically identical with natural diamond,but the price is much lower than that of natural diamond;different from the method of high temperature and high pressure(HTHP),CVD artificial synthetic technique does not need to use the catalyst,and puts an end to forming metal inclusions,cracks,holes,etc.in the production.

　　Features:after polishing,the clarity is commonly VVS and above level,color chromaticity of D-J.

　　We can provide raw diamond at carat level.