Diamond ring brand factor: different diamond ring brands have different positioning and pricing, and different brands will also cause different prices.
In addition, "4C" is a measure to judge the value and quality of a diamond. The so-called "4C" is the abbreviation of four English words beginning with C, which refers to the weight, clarity, color and cut of diamonds. Combining the four points of "4C", we can easily understand the value and quality of a diamond. Diamond price = weight+color+clarity+cut.
weight
The weight of diamonds is measured in carats (also called cards). 1 carat = 200mg = 0.2g A carat is divided into one hundred parts, and each part is called one point. 0.75 carat is also called 75 cents, and 0.02 carat is 2 cents. Under other similar conditions, with the increase of diamond weight, its value increases geometrically; Diamonds with the same weight will have different values due to different colors, cleanliness and cutting. You can find high quality diamonds in every different size and shape. The most important thing is to find a diamond with the right size and style that you like. You might as well try it on at the jewelry store. When it looks and feels right, it should be yours.
clean
Diamonds are crystallized from mantle magma deep in the earth, with complex environment, diverse components and extremely high temperature and pressure. After hundreds of millions of years of geological changes, it is inevitable that there are all kinds of sundries or defects in it. The color, quantity, size and location distribution of these inclusions have different degrees of influence on the clarity of diamonds.
The clarity of a diamond is usually classified by using a magnifying glass with a magnification of 10 to classify the internal and surface defects of the diamond and their influence on the luster. According to China's national inspection standards, it is divided into LC, VVS 1, VVS2, VS 1, VS2, SI 1, SI2, P 1 and P2. Diamonds are divided into five grades: excellent, very good, good and relatively good. P-class drill is also called I-class drill. Generally, diamonds below grade P are not used as gem diamonds, so they are generally only classified as grade P and no longer classified as P 1/P2/P3.
IF, VVS, VS, SI and p commonly used in the world are respectively interpreted as:
(1)IF is flawless, and it is LC in China, that is, it can't be seen under a ten-fold magnifying glass-remember: it is impossible to give this level to the classification of inlaid diamonds in China.
(2)VVS is subdivided into VVS 1 and VVS 2. Very, very, very tiny inclusions-pink inclusions that professional diamond graders can hardly find under a magnifying glass of 10 times.
(3)VS is subdivided into VS 1 and VS2, and the inclusion of VS is greater than that of VVS, which is difficult for professional diamond graders to find under the microscope of 10 times, and the inclusion of VS2 and VS is greater than that of VS 1. VS grade is the dividing line of high quality diamonds.
(4)SI is subdivided into SI 1 and SI2, all of which are small defects. SI 1 can be easily seen under a magnifying glass of ten times, and there are many points with SI2 scores; -Si inclusions are invisible to naked eyes. Therefore, when buying diamonds, the naked eye above the SI level can't tell the difference.
colour and lustre
Diamonds have many natural colors, from precious colorless (white after cutting), rare light blue and pink to common light yellow. The more transparent and colorless, the more white can penetrate, and the richer the color after refraction and dispersion.
The grading of diamond color is determined by technicians repeatedly comparing the diamond to be graded with the standard color colorimetric stone in the grading environment of professional laboratories.
The whitest diamond is set to D (that is, starting from the first letter of the diamond). Diamond color * * * is divided into 1 1 grades, which are D, E, F, G, H, I, J, K, L, M and N respectively.
incision
Diamond cutting refers to the accuracy of its cutting and grinding ratio and the perfection after finishing. Good cutting should reflect the brightness and fire color of the diamond as much as possible, and try to keep the weight of the original stone. GIA's cutting grade is divided into ID (standard), EX (very good) and VG (very good) G (good) from high to low, and China's national inspection is divided into EX (very good), VG (very good) and G (good). The best cut is "eight hearts and eight arrows", which adopts the world's top Cupid-style cut and is the unique original diamond cut of CEMNI for thousands of years. Eight hearts and eight arrows are perfectly symmetrical, and the precise and flawless cutting is amazing.
In China, ordinary people generally measure the value of diamonds by weight. Actually, it is not scientific. Because small diamonds are very popular in China. Therefore, the more popular concept is high-quality diamonds. High-quality and bright diamonds generally grasp the three principles of 4C: clarity, color and cut, and the three standards must reach a certain standard at the same time.