How are diamonds graded? How to distinguish diamond grades

The grades of diamonds are generally divided into:"The quality of a diamond is based on the 4Cs – the 4Cs directly determine the grade of the diamond.

1. Weight (carat, carat, identification mark for CT): Needless to say, of course, the heavier the better, the more expensive. 2. Color:

The international general standard, with the whiteness and transparency of the color as the measurement standard, starting from D (the color D grade is the whitest grade), once arranged backwards, the more yellow the diamond is, the current domestic market to N color, N color after there is little demand. Suggestion: F-J is acceptable.

3. Clarity: Commonly used in the world is IF, VVS, VS, SI, P. Purchase suggestion:

From a price-performance point of view, SI-VS diamonds are highly recommended. If you like to collect, and want to be a friend who preserves the value of investment and has strong financial resources, it is recommended to buy VVS-IF diamonds.

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Diamond 4c Standard 1 Weight 2 Color D e f g h... Z 3 clarity FL IF VVS VS SI I 4 cut.

Search for the 4Cs of diamonds on the Internet.

Clarity grading with a tenx magnifying glass, color grading with a masterstone with the naked eye, cutting grading with a cutter, and weight grading with a balance. After the inlaid diamond can only be divided into large grades, and the error is relatively large, there are unscrupulous merchants will be low-level diamond flaws set up to pretend to be high-grade, so it is best to buy diamonds with a loose stone certificate to protect rights and interests:

Clarity: LC, VVS, VS, SI, P, generally no LC color: D-E, F-G, H, I-J, K-L, loose diamonds are divided into small grades:

Clarity: LC, VVS1, VVS2, VS1, VS2, SI1, SI2, P1, P2, P3

Color: D, E, F, G, H, I, J, K, L, M, N Cut: Use an automatic cutting scale meter to measure various ratios and parameters.

1. According to the number of carats, one carat belongs to the dividing line of diamond grading, which is mainly divided into diamonds higher than one carat and lower than one carat.

2. According to the color, the diamond is divided into 23 color grades from colorless to light yellow, from D to Z, and D is the highest.

3. According to the clarity, it is divided into FL, IF, VVS, VS, SL, and P grades from high to low.

When it comes to diamonds, no one doesn't like them, but diamonds are also graded, do you know how to distinguish them?

01 carats.

Carat refers to the weight of a diamond. Diamond weight grades are based on the diamond's unit of weight, the carat. It can be seen that weight plays an important role in the division.

One carat is equal to a gram, and in terms of points, one carat is equal to 100 cents. Typically, one carat falls under the dividing line between diamond grading and divides it into two categories: diamonds above one carat and diamonds under one carat.

02 Color.

Diamonds are not only white, they are also divided into other colors, which are graded as D, E, F, G, H, I, J, K, L, M, N. Among them, D, E and F are transparent and colorless, very rare and precious, and the distinction between them depends on the careful discrimination of experts. G to L are the more common colors, and most of the diamond rings purchased in daily life belong to these colors.

M is yellowish, close to colorless, and difficult for the average person to distinguish. The one below m is light yellow, which is also easy to distinguish, and it is much cheaper than others.

03 Clarity.

Freshly mined diamonds have impurities inside, and experts preliminarily grade them according to the amount of impurities inside the diamond. The fewer impurities, the more valuable, and the more impurities, the lower the level. The last thing to look at is the cut of the diamond, which is the technical work of creating a diamond jewelry that determines how and how much the diamond sparkles.

Finished diamond rings can see the diamond being cut into different faces, large and small, and it is precisely because of these cut faces that the diamond shines brightly.

04 Cut.

Cut refers to the geometry and arrangement of various flaps of finished loose diamonds, and the cut is divided into three parts: cutting ratio, polishing and finishing. Each item has five levels, from highest to lowest: excellent, verygood, good, fair, poorWhat you typically see is a standard round diamond cut.

The top cut stone can achieve a closest to perfect ratio for light reflection, that is, the three E X (Excellent) cuts, but the price of such a cut is also slightly more expensive, because its yield is relatively low, about 5% higher than the price of the non-triathlon EX cut, but the color of the triathlon EX is definitely the most gorgeous In the case of the other three of the 4C standard, the quality of the cut is also very important! Once it's cut, the diamond's fire shines.

Diamonds are divided into 23 color grades by color, ranging from colorless to pale yellow, represented by D to Z, with D being the highest; The clarity of a diamond, from high to low, is graded as FL, IF, VVS, VS, SL.

The color grade of diamonds can be roughly divided into 5 grades from D to Z, among which D, E and F are the best grades and colorless, D is the best, and E and F are secondary. After that, G, H, I, and J are sub-optimal and close to colorless. The next grades are colored from kz, k, l, m are slightly yellow, and nz is the worst slightly yellow.

Diamond cut can be divided into 6 grades, which are excellent, verygood, good, medium, fair, poor (good below good is not recommended to buy).

Diamond purity can be roughly divided into 5 grades from FI: FL Flawless (flawless), IF Flawless (internally flawless), VVS Minimal Perfection (the difference between VVS1 and VVS2 is that the latter has tiny cotton dots and small stubble, etc.), VS Slightly Blemish, and SI Small Blemish.

It depends on the inspection agency, some of the big well-known brands are adopted by the national testing socks which unit, the certificate issued by the National Jewelry and Gemstone Quality Supervision and Testing Center, and the national general, because the National Jewelry and Jade Quality Supervision and Inspection Center is a national jewelry and jade professional quality inspection institution authorized by the State Bureau of Quality and Technical Supervision in accordance with the law, and is an authoritative institution in domestic jewelry and jade testing. The second is to look at the test content, including the name of the jewelry, the diamond quality level and the "4C" standard, namely: shape, color, clarity, total quality and other items.

Again, it is necessary to check the physical product against the physical ** on the certificate.