As a mineral, diamond itself is scarce, especially the large-volume diamond, which is very scarce. At the same time, bare diamonds have to undergo special processing, as well as the design and production of rings, necklaces and other accessories before they can be processed into jewelry. These subsequent processing, production and marketing have formed a brand, and there is a brand premium problem.
The quality standard of diamond is the 4C of diamond, that is, color, weight, clarity and cut. The real value of the diamond itself is only related to 4C. In addition, the price of diamonds is determined by the quotation made by RAPAPORT, an international diamond organization, which forms the price basis for global jewelers to wholesale diamonds.
Extended data
4C diamond
1, diamond color: refers to the colorless degree of the diamond.
For most precious diamonds, the identification standard of color depends on its colorless degree. A diamond with perfect structure and no impurities, like pure water drops, is colorless and of high value. GIA has established a D-Z color grading system to identify the colorless degree of diamonds by comparing with' colorimetric stone' under precisely controlled illumination and observation conditions.
2. The clarity of diamonds refers to the degree to which they have no inclusions and surface features.
Natural diamonds are formed by carbon at high temperature and high pressure. This process also leads to the internal characteristics of each diamond, which are called "inclusions", while the characteristics of the diamond surface are called "surface characteristics".
3. Diamond cutting: complicated procedures and exquisite cutting skills.
Only after careful cutting and grinding ratio, symmetry and polishing can the unique brilliance of diamonds be perfectly displayed. Cutting is very important for the appearance and value of diamonds, and it is the most complicated and technically demanding appraisal standard in 4C standard.
4. Carat weight of diamonds: Carat is the measurement standard of diamond weight.
1 carat is 200 mg, and the bigger the diamond, the higher the rarity. So the price of diamonds will increase with the increase of carat weight. However, even if two diamonds weigh the same, their values (and prices) may be quite different. Because the value of diamonds also depends on the other three standards in 4C standard: clarity, color and cut.
Baidu Encyclopedia-Diamond 4C Grading
People's Network-Diamond profiteering: the price of shopping malls 1 10,000, the ex-factory price is only over 3,000.