One: What are the advantages and disadvantages of cultivating diamond HPHT and CVD?
Advantages: High color grade, generally up to D, E, F color, do not need to change color, also do not worry about changing color.
Cons: Most under 2 carats, few over 3 carats.
Pros: Can be used to drill large carats, 3-5 carats are not uncommon.
Disadvantages: The colors are generally G and h. In order to upgrade the color level, the colors will be upgraded to D, E, and F through high temperatures. Try to avoid changing colors by drilling holes. As can be seen from the international certificate, discoloration (no indication of post-growth treatment) means no discoloration.
Two: What are the professional certificates for cultivating diamonds?
International authorities: IGI, GIA, (HRD); National Authority: NGTC (NGIC)
Three: How to choose to cultivate diamonds to get the best cost performance?
If you don't have to pursue carat stone, it is more cost-effective to choose dozens of points customized according to your budget. There is no need to save a fraction of the price of a standard natural diamond of the same quality. Reference price 50 points, 2-3k; 80 points 4-5k; 100 minutes, 6-8K, etc.
The above price is not for CVD or HPHT, for reference only. Some might say that this price is a little cheaper. There are too many factors affecting the price. The 4C quality of a diamond, whether there is discoloration, whether there is phosphorescent tone, what certificate, and whether there is a brick-and-mortar brand, will affect the price of a diamond.
Learn to read the 4C certificate standard. No degradation, no discoloration, no phosphorescent blue light, priced in reasonable units. It's not the cheapest = the most valuable, or the most expensive = the best, by your own judgment.