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Dr. Yuan talks about diamonds: Can diamonds preserve value and increase value?
Diamond is a kind of commodity and luxury goods. After all commodities, especially luxury goods, are bought by consumers and sold as second-hand commodities, they will have a very high price difference. For example, cars and new cars will be sold soon after landing, with a price loss of about 15-25%. After buying diamond jewelry, wear it for a year or two and then sell it, tax, rent, expenses, profits of jewelry stores will be reduced. In addition, the discount of auxiliary diamonds, metals and inlays will be reduced. After the diamond is inlaid and worn for a period of time, the diamond will have a cleavage surface that is easy to be bruised. It will need to be polished again. The loss of weight is inconsistent with the weight of the original certificate. It needs to be re-certified, even if there is no bruise, the diamond's certificate is outdated and must be re-issued with a new date before it can be easily sold again. The result of certification may be degraded in color, clarity and lathe, because large wholesalers send identification certificates in batches and small jewelry stores occasionally send one or two certificates, which are often degraded.
01
2021
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12
Dr. Yuan talks about diamonds: exploring LIGHTBOX to nurture diamond growth factories
The future of the diamond cultivation market mainly depends on De Beers's policy. If in the future, 3 karat and 4 karat finished products of diamond cultivation are also sold for US$800/carat, De Beers should not maliciously disrupt the diamond cultivation market by excessive catfish methods, which will cause global industry resistance. Large carat CVD cultivated diamonds have a poorer yield of clarity when grown than small grain diamonds, so they should be sold at a higher price than small grain diamonds. At present, the market is graded at 4C and sold at a similar rate to natural diamond quotations. Global diamond cultivators should unite under associations and alliances to formulate rules and sell reasonably together.
24
2021
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11
Dr. Yuen talks about diamonds: issues in the diamond grading report.
The proportion of cultivated diamonds in the global diamond market will be about 10% by the end of 2021. More than 95% of the certificates used are IGI certificates, and the remaining small amount is issued by GIA or other identification. GIA issued the cultivation diamond grading report does not attach a physical certificate, the price is still the same as the natural diamond has a physical certificate, the cultivation diamond market price has been 10-30% of the natural diamond, the price of the grading report is too high, unreasonable.
17
2021
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11
Dr. Yuan talks about diamonds: CVD cultivation of diamonds HPHT color change
CVD cultivated diamonds will not harm the wearer after heat treatment and change their color. The color is stable, will not cause potential damage to diamonds, has lower cost than extremely slow direct whitening, cannot or is not easy to identify minor heat treatment, and cannot clearly determine whether heat treatment has been carried out in the grading report. In recent years, unclear marks in the remarks column of the certificate about the latter heat treatment, such as "may include post-growth treatment" and "no sign of post-growth treatment" are unnecessary.
10
2021
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11
Dr. Yuan on Diamonds: De Beers Policy for Cultivating Diamonds
After the depletion of natural diamonds, De Beers will continue to control the global nurturing diamond market, including pricing power and supply. They will have more than $0.1 billion in cash to expand CVD equipment, enough to supply the global demand for diamond cultivation. They can fight for control of the global cultivation of diamonds. We have high temperature and high pressure cultivation of diamonds and CVD cultivation of diamonds in China. As described in this article, the improved supply will compete with De Beers, but we must really unite and divide the global cultivation diamond market equally with De Beers.
03
2021
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11
Dr. Yuan talks about diamonds: what you should pay attention to when investing in HPHT plants
Since GE Company first grew high-temperature and high-pressure synthetic diamonds in 1953, China also grew successfully until 1963. Up to now, everyone has worked hard to grow large particles for jewelry use. In recent years, about 20 billion carats of yellow abrasive have been grown every year by high-temperature and high-pressure methods, and about 8000 sets of six-sided top presses have to be used. White jewelry uses about 3 million carats of large diamonds and about 3000 sets of six-sided top presses, which are absolutely dominant in the world. Other uses are very small, such as car blades, wire drawing dies, etc.
27
2021
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10
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