Generally, diamond jewelry must have a quality inspection certificate. There are many certificates from the National Quality Inspection Center and Gemstone Association, and the evaluation criteria are the same. The price of diamonds varies greatly, mainly depending on the size (number of carats), clarity, color and cut. Many ornaments that look little different will have great price differences, which is the characteristic of exquisite products. Generally speaking, the main factor that determines the price is size, because the color and clarity of small diamonds are not expressive, and big diamonds will be graded by clarity and color. Certificates can be queried online, with unique number and photo comparison.
Generally speaking, the size is calculated by "minutes", 1 carat = 100 minutes, and more than 20 minutes is better; Clarity is divided into two grades: vvs and VS. Larger diamonds can be divided into finer grades, and each grade should be divided into 1 and 2. Colors I-J are standard, and H and G are good. There are few F colors, and D colors are not even made by my major. The corresponding K-L is a general commodity, and the values of m and n are low.
These domestic brands are all made in processing plants in Shenzhen, and then sold at different prices with their own labels. Homogenization is very serious, because the door of the processing plant is always open. As long as you find out which factory made this style (every processing factory is competitive in pushing new models), you can get the same goods at similar prices. Of course, there are also cases where big brands buy out a certain style. Generally, other factories can follow suit if they do well, but there are differences.
The price of diamond jewelry consists of stone, gold, processing fee (the type of money and jewelry determines the price difference, while the type of gold determines the cost of production, for example, the processing fee of the same type of platinum jewelry will be higher than that of gold), certification fee (a good product will definitely be certified) and gold loss (jewelry will be lost in the processing process, and the amount of gold will definitely be more than the finished metal product, which is controlled by the processing factory.
Finished products always include labor and capital occupation fees, which will account for a high proportion in shopping malls, especially large shopping malls, which is also the reason for the great price difference, but as far as the products themselves are concerned, there is no difference.
We can also choose custom-made, choose styles, approximate quantities of precious stones and gold to be used, plus some other expenses. We can get it in a week or two (we have to make the list in Shenzhen and send it back by express). It is not very urgent to use this method.
In the past two years, the prices of metals and jadeites have risen sharply, but the prices of diamonds remain stable. From the perspective of investment, there will be much more room for the appreciation of diamonds in the future. Buying now is a good choice. When the profit margin of gold becomes smaller, there will be a lot of money to speculate on other investment products, and diamonds are a good choice.
I have been in this business for two years, and I am familiar with it from the processing plant to the sales terminal. You can ask me any questions. Hehe, I have come into contact with the most basic part of this industry, and nothing is insider to me.