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Dr. Yuan talks about diamonds: nurturing recent price trends in diamonds
The global demand for cultivated diamonds is still in short supply, but the selling price has dropped by 1/3 from the beginning of 2021 to September 2021. The main reason is that CVD diamonds produced in India and HPHT rough produced in China are processed into finished diamonds in India, and IGI certificates are obtained in India and sold to the world and China at low prices. The reason for the low price: 1. The color of CVD diamond in India is not pure, with brown and gray tones, but the grade given by IGI certificate in India is higher than that of IGI certificate in other regions. Bad money drives out good money, which reduces the price of domestic online sales, and also affects the price of domestic regular diamonds. Blue Nile will start selling 2 karat white diamonds at US$800/carat in October. An earthquake will definitely break out in the domestic diamond market. Everyone should respond as soon as possible.
08
2021
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09
We can estimate whether De Beers' policy will sell 3 karat and 4 karat ordinary quality according to US$800/ct in the future? De Beers only invests US $94 million in the Lightbox now, and if the market needs it in the future, they can easily continue to invest hundreds of millions of dollars to supply the market in unlimited quantities.
01
2021
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09
Since the technology of diamond growth at high temperature and high pressure has matured, in the 1980 s, some growth factories in the United States and Switzerland developed to extract the carbon contained in ashes and hair, process it into graphite, and place it in a graphite column as a carbon source to grow diamonds under high temperature and high pressure. They are called life diamonds. But so far, it has been unable to popularize in large quantities. The reason is that the trust degree of consumers is not enough. It is doubtful whether the whole diamond is indeed made from the raw materials provided by customers? Will it be mixed with the industrial carbon source? This factor makes the life diamond has not been popularized in large quantities for decades.
21
2021
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08
Dr. Yuan talks about diamonds: which is better, HPHT or CVD?
In recent years, diamond cultivation is a new industry. Numerous enterprises and individuals around the world have entered or are considering entering the diamond cultivation industry. Other countries are directly considering investing in the growth of CVD diamonds. In China, everyone pays attention to high temperature and high pressure and CVD at the same time. The products obtained by these two methods, especially jewelry diamonds, are basically similar, but their industrial uses are quite different, the production efficiency and market of these two models have their own advantages and disadvantages.
18
2022
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08
In addition to jewelry, natural and cultivated diamonds are gradually replaced by cultivated diamonds in industrial applications. Only some high-end tool applications still use natural diamonds. The abrasive part is completely supplied by high temperature and high pressure products. Diamond single crystal turning tools, mostly supplied by high temperature and high pressure; Turning tools over 6mm can be supplied by CVD products; Other large-area flake and slender diamond single crystals are supplied by CVD products; polycrystalline diamond self-supporting sheet, supplied by CVD products; PCD (polycrystalline diamond), NPD (nano-polycrystalline diamond) and other blades, grinding sheets, wire drawing dies are supplied by high temperature and high pressure products.
21
2021
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08
Dr. Yuan talks about diamonds: colored cultivated diamonds
The production and market conditions of colored cultivated diamonds are similar to those of artificial color change of natural diamonds. Both of them are of poor color and clarity, which are not suitable for direct sale as white diamonds, that is, diamonds of poor quality to artificially change colors. For example, diamonds with light brown to medium brown color and clarity with cloudiness or many flaws, which are not suitable for sale in white diamonds, are used for irradiation, high temperature and high pressure treatment or heat treatment to change them into various colors and then sold.
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2021
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08
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