Diamond clarity classification:

Inclusions in diamonds refer to impurities, including clouds and cracks. The less inclusions, the higher the clarity grade, the rarer the diamond and the higher its value.

FL: Flawless-when viewed by professionals under the magnification of 10, there are no flaws inside and outside, which is the rarest and most precious among all cleanliness grades.

If: flawless interior-professionals observe under the magnification of 10, there are no flaws inside, but there are tiny flaws on the diamond surface.

VVS 1: Very tiny flaw1-At the magnification of 10, professionals only observed a tiny flaw.

Vvs 2:2: Very tiny defects-professionals observed individual tiny defects under the magnification of 10 times.

VS 1: micro-flaw 1- 10 times magnification, it is difficult to single micro-flaw.

VS2: Micro-defect level 2- 10 times magnification is more difficult to count micro-defects.

SI 1: small defects 1 level-10 times magnification, obvious defects are easy to observe.

SI2: Small defect level 2- 10 times magnification, it is easy to observe several obvious defects.

P 1 (floret): Generally, it is between visible and invisible when viewed from the crown with naked eyes. It's easy to see the flaws.

P2 (middle flower): The naked eye can easily see larger or more inclusions from the crown, which has obvious influence on the brightness of the diamond and makes it look dull. It will also affect the durability of diamonds.

P3 (Big Flower): It is easy to see the characteristics of diamonds with naked eyes, and the number or individuals are very large. They not only affect the transparency and brightness of diamonds, but also affect the durability of diamonds. Typical transparency features are large plumes of smoke, a group of cracks or large cracks. P3 diamonds are almost the same as industrial diamonds.

How to see the fineness of diamonds and how many grades are there? What's the difference between the best and the worst?

The quality of a diamond depends on its 4C (color, purity, cut and carat weight) classification:

Color classification: d, e, f, g, h, I, j, k, l, m, n,

Cleanliness: China: LC, VVS 1-2, VS 1-2, SI 1-2, p1-3;

GIA:FL-IF、VVS 1-2、VS 1-2、SI 1-3、I 1-3。

Cutting classification: five grades: excellent, good, medium and poor.

Cutting classification is to classify diamond processing technology from two aspects: proportion and degree of modification. The modification degree includes polishing quality and symmetry deviation. The ratio is classified as: very good, good and average; Polishing and symmetrical classification refer to cutting classification.

In addition, the fluorescence reaction is also graded, and the standards are: none, weak, medium, strong and very strong.

Weight classification: based on the direct weighing of bare diamonds, the weight units are carat (ct) and minute (pt), 1 carat = 100 minute = 0.2g The higher the carat weight, the more expensive the diamond with the same quality.

The best indicators rank first, and the quality decreases step by step. Color: m, cleanliness: below I3, rarely seen in the market.

For reference only.

What kind of clarity grade is the best for diamonds?

Carat 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 minutes, and 0.0 1 carat is 1 minute. 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.

Clarity (clarity)

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. Diamonds below grade P are generally not used as gem diamonds, so they are generally only classified as grade P and are no longer classified as P1; P2； P3 .

Color (color)

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). The color of diamonds is divided into 1 1 grades, which are D, E, F, G, H, I, J, K, L, M and N in turn.

Cut (cut)

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. The cutting grades of IGI International Gemological Institute are divided into ID (standard), EX (excellent) and VG (very good) G (good) from high to low, and the domestic national inspection is divided into VG (very good) and G (good).

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.

The price of a diamond should consider these factors comprehensively, not just one or two indicators.

What are the grades of diamonds?

How to distinguish diamond grades?

diamond ring

What about the diamond grade in the garden? The grades of diamonds that have been inlaid are generally divided into: clarity: from high to low, there are five grades: LC, VVS, VS, SI and P, and LC grade is generally rare. Color: from high to low, it is divided into five grades: extremely white, excellent white, white, light yellow white and light yellow white, with white and light yellow white as the main ones. Weight: the weight unit is ct, 1 carat = 0.2g = 100 minute, and the general diamond grade should be indicated above 100 minute. Cut-off value: Cut-off value is generally not used to evaluate diamond setting. The fluorescence of diamond has nothing to do with the quality of diamond, which is one of the evidences to ensure that the certificate corresponds to the diamond.

The classification of diamonds is mainly based on the "4C" international standard. Therefore, we should pay attention to the "4C" western proverb "A diamond is a girl's best friend", and China also has the saying "A diamond is eternal, and another is eternal". Although many people also choose other jewels as engagement rings, such as rubies, emeralds or pearls, diamond rings are the most fashionable choice at present. Pay attention to the "four Cs" when choosing diamonds: cut-cut, clarity-clarity, color-color, carat-carat.

Cutting: The cutting of diamonds is extremely important, which directly affects the value of diamonds. Only the standard cutting method can show its brilliant light and achieve the perfect combination of clarity and color. The cut diamond is usually spherical or conical. There are many shapes of cut surfaces, such as square, rectangle, hexagon, circle and ellipse, but the most popular one is the simple hexagon, and many of its cut surfaces can better show the light of diamonds.

Cleanliness-Cleanliness: Diamonds are crystallized from mantle magma deep in the earth, which has undergone geological changes for hundreds of millions of years and has various natural traces. The color, size and position distribution of these marks have different degrees of influence on the value of diamonds. There are often defects on the surface or inside of diamonds, such as bubbles, cracks, feathers and so on. The fewer flaws, the higher the grade of the diamond. Generally speaking, the clarity of diamonds is divided into five grades and ten grades.

Color-color: The color of diamonds ranges from precious colorless, rare light blue and pink to common light yellow. The more transparent and colorless the diamond is, the more white light can penetrate, and the more colorful it is after refraction and dispersion. The whitest diamond is grade D, and the others are grades E, F, G, H, I, J, K, L, M and N in turn.

Carat: The weight of diamonds is measured in carats. 1 carat equals 0.2 grams. One carat is divided into 100, such as 0.75, which is also called 75. Diamonds with the same weight will have different prices due to different colors, cleanliness and cutting. For example, a 2-carat diamond cannot be an ideal choice if it is cut elegantly, its shape is outdated, there are many bubbles and its clarity is low. A diamond weighing only 1/2 carats will be more attractive and more expensive if it is colorless, high in purity and adopts the most popular cutting. [idoer]

What colors do diamonds have? What are the grades of diamonds?

Diamond is the best color.

Of all the diamond nobles in QQ, which is the most cost-effective?

I think Yellow Diamond and its members are the most practical and cost-effective. The function of the yellow diamond is mostly to cooperate with the members. It's best to start with yellow diamonds, every month 10 yuan. If you want to open a member first, you need 10 yuan. But if you open a member and then open a yellow diamond, you will get a discount. It's not practical for you to buy a red diamond, because the red diamond is a QQ show in addition to its privileges, but if you don't need to look good, you can wear it in the mall, because if you are in trouble, you can exchange the points and Q beans that Tencent gave you after you opened the yellow diamond and membership for the QQ show. There are many good-looking QQ shows that can be exchanged for points and Q beans. There are also yellow diamonds that can be dressed for free, and you can choose free supplies according to the level. There are also beautiful stationery that can be used as a background album for your diary. The yellow diamond has a large space and can send three flowers every day. Oh, Green Diamond has nothing to do except upload the voice of his computer. Besides music, it is the MV of Green Diamond, but now the Internet is so big, you can also find a music you want to listen to and post it. It doesn't matter. There's no need to open it. I drove it before and upgraded it to Green Diamond 2, but it's not used now. I just don't think it's useful Compared with yellow diamonds with few functions, pets can earn food by working on their own. QQ Hall has its own skills, that is, it is the first expert to meet. How can technology surpass it? Green diamond? Download and listen to music for free. Now the yellow diamond also has this privilege. The most cost-effective thing is to open the yellow diamond to become a member, because members have preferential activities such as game packages every month, and there are special yellow diamond functions during the Chinese New Year. Compared with other diamond privileges and applications, members have the best bookkeeping. Forget it. Typing is very hard.

What colors do diamonds have? Which is the best?

Among the colorless diamonds, there is also a kind of crystal clear and water-transparent diamond, which can feel a pure light blue with the naked eye. This kind of diamond is called "fire and water diamond" and it is also the best among colorless diamonds.

Most natural diamonds contain different kinds of pigments. Generally speaking, pigments have a great influence on evaluating the quality of colorless diamonds, such as impure blue or yellow, brown, etc., which are all important factors to degrade colorless diamonds. However, when a diamond has pure and obvious color, it does not belong to the category of "colorless diamond", especially when it has red, dark blue, pink, rose red, golden yellow, green and other colors, it belongs to a rare colored diamond. Colored diamonds known a few days ago can be divided into the following categories according to their colors:

First, red diamonds: red diamonds are divided into blood diamonds and purple diamonds according to color. Blood diamonds are as bright as blood, gorgeous and incomparable, which are extremely precious and rare in colored diamond. 1989 In the spring, a 2.23-carat blood diamond named "Laqi" was exhibited at a jewelry fair in Paris, with a bid of $42 million. The beauty of "Laqi" is fascinating, and its expensive price is staggering. Compared with the price of gold at that time, it was more than100000 times of gold and more than 2000 times more expensive than colorless diamonds. "Laqi" blood diamond originated in Gorgonda, an ancient Indian diamond mining area, which means "great wealth". Judging from its mass production, it has a history of nearly 500 years.

1April, 987, one weighing 0. 95 carats were sold at a jewelry auction in the United States for $880,000, and other expenses were nearly $950,000, which set a record for purple diamonds per carat/kloc-0.0 million dollars. It is understood that several blood diamonds have been found in the world, and one of them is still kept in the Smithsonian Museum. The whereabouts of the rest are unknown.

2. pink diamond: It is a light pink or rose diamond with elegant and quiet color and elegant and luxurious charm. 1980, a pink diamond weighing 2.27 carats was sold at a price of127,000 USD. 1June, 990, a pink diamond originally belonging to the Mughal Emperor of the North Indian Empire was auctioned at Christie's auction house in London, England. This diamond weighs 32.24 carats, and the auction price is 4.07 million pounds, with an average of $220,000 per carat. It is reported that Iranian King Pahlavi wore a Wang Guanzhong inlaid with a giant pink diamond, weighing about 60 carats, at his wedding in 1958. According to research, pink diamond was originally named "Sea of Light" and weighed 787 carats. It was produced in17th century in the famous Colell diamond mine in Golconda region of ancient India. The maharaja of Mimomora, who originally belonged to ancient India, was later accepted as a tribute of Mughal emperor Shajehan. After the first polishing by Indian craftsmen, it became a rose-shaped diamond ornament weighing only 300 carats. 1739, King Nadir of Persia led his troops into Delhi, the Mughal capital, and the "Sea of Light" became the trophy of the Persian kingdom and was brought back to Tehran. After several polishing, only 60 carats of modern batch diamond ornaments were left, which were renamed "Eye of Light" and embedded in the crown worn by the Iranian king at his wedding.

In pink diamond, the diamond mine in argyle produces a certain amount of pink diamond and rose diamonds. Generally, the particle size is not large, and the average price of a carat diamond is 1000 USD, of which the sales price of a 3 is. The 5-carat rose diamond is as high as $3.5 million.

Third, green diamonds: the green tones in diamonds are different, and the depth of green in a green diamond is often different. Generally speaking, a uniform green color is better, and a simple and elegant color tone is better. The most famous green diamond in the world is the "Dresden" green diamond discovered in 1743, weighing 408 carats, even apple green. At that time, it was worth 3 million pounds, and now the lowest valuation is 10 million dollars. Dark green diamond particles have been found many times in the diamond deposit in Tancheng, Shandong Province.

4. Yellow diamond: Yellow diamond, also known as golden diamond, refers to the yellow or golden diamond with pure color and bright tone. Besides yellow and golden yellow, wine yellow and amber diamonds are also common. Such as "Taifini" yellow diamond and "Tibeia" gold diamond (the diamond weighs 234.5 carats), and "Golden Rooster Diamond" produced in Tancheng, Shandong, China, weighs 28 1. 25 carats. This diamond is apricot yellow, gorgeous and captures sunlight. This is the largest gold diamond found in the world. 1938 was snatched by the Japanese invaders, and its whereabouts are still unknown.

Blue Diamond: It is also a charming colored diamond. Can be called ......

What are the grades of diamond clarity? If you want to buy it, what level will be better?

The grades of stone clarity from high to low are FL, IF, VVS 1, VVS2, VS 1, VS2, SI 1, SI2, I 1, I2 and I3. However, among so many grades, the inclusions of diamond clarity grades of SI 1 and above are invisible to the naked eye. In fact, buying a diamond ring is not the most important thing. The most important thing is that the diamond ring you choose is what the other half likes. Of course, if you choose a DR diamond ring that can only be customized in this life, which means the only true love in your life, then the person I want to accept will be very happy and moved.

What are the grades of clarity of diamonds?

Diamonds are classified according to the position, size and quantity of inclusions. From high to low, it can be divided into FL, IF, VVS 1, VVS 2, VS 1, VS 2, Si 1, Si2, Si3, P 1, P2, P3. Observe them carefully under a ten-fold microscope.

1, fl-"perfect", perfect. Under the magnifying glass of ten times, there are no flaws inside and outside.

2. If-"there is no flaw inside", there is no flaw inside. Under the magnifying glass of ten times, only the surface has slight flower marks.

3.vvs 1, vvs2-"very very narrow", very, very small. Defects that are hard to see under a ten-fold magnifying glass. The definition of VVS 1 is higher than that of VVS2.

4. VS 1 and vs2-"very thin", very small. Defects can be seen under a magnifying glass of ten times, but it is difficult for the naked eye to recognize them. The definition of VS 1 is higher than that of VS2.

5, Si 1 and si2-"light inclusions", small flaws, which may be visible to the naked eye.

6.I 1, I2, i3-"Imperfect" is flawed and visible to the naked eye.