Diamond rating (fluorescence diamond rating)

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List of contents for this article:

• 1、How to grade the clarity of diamonds
• 2、Color Diamond Rating| Color grading of colored diamonds
• 3、What is the difference between ideal and ex in diamond cutting grading?
• 4、Diamond ring grade FG clarity SI is a good diamond ring?
• 5、How to distinguish between GIA, AGS, EGL and IGI diamond identification agencies
• 6、Diamond rank ranking

How to grade the clarity of diamonds

That is, the amount of content in the diamond under a 10-times magnifying glass. GIA divides the clarity of diamonds into FL, IF, VVS1-VVS VS1-VSSI 1-SI2-SIII1-I2-I3 and other levels, which are reduced from front to back. Generally, we think that the high cost performance of wearing is VS1-VS2. It is more appropriate to collect IF. When buying a diamond ring, we should consider buying an SI1 level. This kind of clarity and cost performance ratio makes it look better. The naked eye cannot see the flaws inside the diamond.

Diamond clarity grading is divided into five major levels and eleven minor levels. Large grade: LC (Immaculate grade): The highest grade, the diamond has no obvious internal or external flaws at all. VVS (Very Flaw Level): Represents a very, very tiny flaw. Only 1 out of 9 stones has a tiny flaw. VS (slight flaw level): indicates a very small flaw, and only 1 in 5 stones has a flaw.

Diamond clarity grading is divided into five major levels: LC, VVS, VS, SI, and P, and is further subdivided into eleven small levels. The specific grading standards and characteristics are as follows: LC level (flawless level) definition: at 10 times Under the magnification conditions, no internal and external characteristics of the diamond are seen. Subdivision: FL (completely flawless): No internal or external features at 10x magnification.

Color Diamond Rating| Color grading of colored diamonds

1. Color grading and color diamond rating are divided into 9 levels based on the bright color of the diamond itself, the light and dark of the color, and the level of color saturation.

2. In addition, although the clarity of colored diamonds will also affect their price, the most important factor affecting the price is the color.

3. FANCYINTENCE (darker): The color at this level is more vivid than FANCYDARK and is close to a darker color. FANCYDEEP (Dark): At this level, colored diamonds are very dark, have high saturation, and present a rich hue. FANCYVIVID (Bright): This is the highest level in the color grading of colored diamonds. The color is bright and eye-catching and has extremely high saturation. It is the best among colored diamonds.

4. Fancy intense: Colors with high saturation and certain brightness are the more precious color levels among colored diamonds. Fancy deep: A color with high saturation and medium brightness, rich and deep color, and high value. Fancy vivid: This is the highest color level of colored diamonds. It has high saturation and high brightness colors. The colors are bright and eye-catching. It is the best among colored diamonds.

What is the difference between ideal and ex in diamond cutting grading?

1. Different systems: EX (Excellent): It is the highest level in the GIA (American Gemological Institute) cutting grading system. GIA is the creator of the 4C standards for diamonds (weight, clarity, color, cutting). Its cutting classification covers three dimensions: cutting ratio, polishing, and symmetry. EX means that these three dimensions have reached the top level. Ideal: The highest level in the AGS (American Gemological Society) cutting classification system.

2. Explanation of two different statements: One statement holds that ideal cutting is a higher rating than 3EX cutting, which is mainly reflected in the AGS certificate system. Another theory is that ideal cutting is EX cutting in the GIA standard, but this is a difference in understanding the description of the highest level of cutting by two different accreditation agencies. There is no question of who is better than who.

3. The difference is basically invisible to the naked eye, but when you look closely, the popularity of the ID cutting is slightly better. The ID (Ideal) and EX (Excellent) cutting techniques used to cultivate diamonds are both top-level, but in terms of details, ID has more stringent requirements on light reflection. If you only observe it based on daily wear, there is almost no difference between the two; if you use a 10x magnifying glass to compare it, the ID-cut diamonds will have a more uniform "eight-heart and eight-arrow" pattern, and the light spots will be more regular.

4. Ideal: This is AGS's highest rating on diamond cutting. Unlike EX, it represents only the highest standards for this particular institution, AGS. Key points: Ideal and EX are inherently not comparable because they are the highest cut levels set by different agencies.

5. In the GIA diamond grade standard, EX represents the highest cutting grade. In the AGS certificate, Ideal is used to represent the highest diamond cutting level. Ideal and EX are essentially two different diamond appraisal agencies. There is no comparable description of the highest cutting levels, and there is no saying who is better than the other. The GIA diamond cutting grade EX (Excellent) is the highest rating for diamond cutting by internationally common certificates, such as the GIA certificate.

Diamond ring grade FG clarity SI is a good diamond ring?

Diamond ring grade FG clarity SI is a relatively good diamond ring and belongs to medium quality. The following is the specific analysis: Color grade: FG refers to the color grade of the diamond ring, which is considered a superior grade. F belongs to the "colorless" echelon and is colorless and transparent when viewed from any angle;G belongs to the "nearly colorless" echelon. For diamonds below 1ct, they are colorless and transparent when viewed from the crown and pavilion. Overall, FG ranks among the top few in the color rating table, with a higher grade level.

The diamond ring color fg clarity si belongs to the lower-middle level, suitable for daily wear, and the overall cost performance is high. The following is the specific analysis: Color: fg represents colorless and nearly colorless diamonds. In the diamond color grade, D, E, and F are colorless, and G, H, I, and J are nearly colorless. Therefore, the fg-color diamonds are visually close to colorless, and can already meet the needs of most people for daily wear.

Overall, the diamond rings of these two color levels are visually more beautiful and can show better colors. In terms of clarity: SI clarity belongs to the level of flaw. Small flaws inside the diamond ring can be seen when observing with a ten-times magnifying glass, but they are usually invisible to the naked eye. Value: If you want the diamond ring to have a certain collectible value, it is recommended to choose a diamond ring with a clarity above VS; if you pursue cost-effective performance, a diamond ring with SI clarity is a good choice.

Diamond rings with FG color level and SI clarity level are of medium overall quality. They are not too expensive, but also show the beauty and brilliance of diamonds. This is a very suitable choice for consumers who pursue cost-effective performance. Of course, the quality of the diamond ring is also affected by factors such as cutting work, carat weight and ring material. When purchasing, consumers can comprehensively consider these factors to choose the diamond ring that suits them best.

The overall performance of the 0-point diamond ring fg clarity si is good and has a high cost performance. The following is the specific analysis: Color performance Color quality: 50 points The color grade of the diamond ring is fg, which means that its color performance is very good, with only a very slight yellow tone, which is almost negligible. In the color grading of diamonds, fg belongs to a higher grade and can show the brightness and shine of diamonds.

How to distinguish between GIA, AGS, EGL and IGI diamond identification agencies

GIA, AGS, EGL and IGI diamond identification agencies are distinguished as follows: GIA (American Diamond Academy): Status: The world's leading diamondscience laboratory, with the highest rating standards and consistency, and the most trusted and widely used rating agency in the industry. Headquarters: Located in Carlsbad, California, with multiple offices around the world.

GIA, AGS, EGL and IGI diamond identification agencies are distinguished by the following methods: GIA: Characteristics: The world's leading diamond-science laboratory, with the highest rating standards and consistency, and the most trusted and widely used rating agency in the industry. Rating system: Use a standard alphabetical rating system. Services: Provide diamond rating and certification, as well as educational services and in-depth research work.

EGL and IGI are two international laboratories with relatively loose rating standards. Generally, if the same diamond is rated by GIA and AGS, the clarity and color rating of the EGL/IGI diamond will be discounted by at least 2-3 levels. For example, diamonds rated G by EGL/IGI may be rated I by GIA/AGS. The same goes for clarity ratings on diamonds. When certified by GIA, diamonds rated S12 may become I1.

Common institutions that issue diamond certificates include GIA, HRD, IGI, AGS, EGL, NGTC, etc. Different institutional certificates differ in terms of rating focus, testing scope, credibility, and fees. The reason why GIA is so famous is that it is the founder of the Diamond 4C standard. It is authoritative, professional, impartial, and has extensive educational influence.

Diamond rank ranking

1. There is no unified comprehensive ranking of diamond grades. The carat weight (Carat, color, clarity, and cutting) is rated as small diamonds below 0.3 carats, 0.3-1 carats for regular wedding rings, and 1-3 carats for mid-to-high-end, and more than 3 carats have collectible value. The carat value directly affects the price but is not an absolute quality indicator and needs to be comprehensively evaluated with other parameters.

2. Diamonds do not have a unified rank ranking, and their rank is determined by multiple factors. These factors mainly include weight, color, clarity and cutting, or the 4C grading system. Weight Weight is the primary factor in determining the price of diamonds. Generally speaking, the greater the weight of a diamond, the higher its price. This is because large grains of diamonds are rarer in nature. Cutting cut has a crucial impact on the optical effect of a diamond.

3. The ranking of diamond levels from high to low is as follows: Color level D: The highest level, diamonds are completely transparent, extremely rare, and expensive. Level E: Almost colorless. Only diamond identification experts can detect a small amount of pigment with professional equipment, which is relatively rare. Grade F: colorless, only experts can see a small amount of color, belonging to high-quality diamonds. Grade G to L: The color gradually deepens, from nearly colorless at Grade G to obvious light yellow at Grade L.

4、. The Mountain of Light is a diamond found in the Korah Mine in India. The earliest discovery dates back to the 14th century. This original stone, which is said to weigh 800 carats, was later carved into a 191-carat rose diamond. After being transferred to the British royal family, it was carved into a round diamond shape and currently weighs 106 carats.

5. The color rarity rankings of colored diamonds are from high to low: red diamond, purple diamond, blue diamond, pink diamond, green diamond, orange diamond, yellow diamond, brown diamond, and black diamond. Red diamonds: The rarest color among colored diamonds. Its quantity is extremely limited, and high-quality natural red diamonds are extremely rare. In the market, the number of red diamonds that can be publicly seen is very small, and every piece is a priceless treasure.