Diamonds N and f (what is the difference between diamond F and FG)

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List of contents for this article:

• 1、How do you rank gemstones from low to high?
• 2、How are diamond levels classified
• 3、Diamond fluorescence grading-Diamond ring grading knowledge
• 4、Diamond color level table?
• 5、What does diamond n/f mean?
• 6、Color grading of diamonds

How do you rank gemstones from low to high?

The ranking of gemstones from low to high is: N-Z, K-M, I-J, G-H, F, E, and D. N-Z level: The color is darker and the fire color is poor. It is the lower level of diamond color levels. K-M level: The color is also darker, and the fire color performs poorly. It is slightly better than the N-Z level, but it still belongs to a lower level.

Grade D: Refers to completely colorless diamonds. It is the highest color grade and is extremely rare. Level E: Nearly colorless, only professional gemstone identification experts can detect trace amounts of color, which is very rare. Grade F: It is still considered a colorless grade. Although there is a small amount of color, it can only be recognized by experts and belongs to high-quality diamonds.

The hardness of common gemstones is sorted from high to low (refer to the Mohs hardness standard, the higher the value, the stronger the hardness) Diamond (Mohs level 10): The hardest natural gemstone currently known, and it is also the hardness ceiling, which can scratch almost all other materials. Red sapphire (corundum, Mohs Level 9): Second only to diamonds, has extremely high wear resistance and is often used in high-end watch bevels and jewelry.

How are diamond levels classified

1. According to the weight, diamonds can be divided into seven grades: - 0.30ct~0.39ct: small carat diamonds, suitable for daily wear. - 0.40ct~0.49ct: A slightly larger carat grade, the price is relatively reasonable. - 0.50ct~0.69ct: half-carat to near-carat level, which has a certain value preservation. - 0.70ct~0.89ct: Close to one carat, the price is relatively high.

2. The level of diamonds is mainly distinguished based on four aspects: weight, color, clarity and cutting. Weight: The weight of a diamond is in carats, 1 gram is equal to 5 carats, and 1 carat is equal to 100 points. The larger the carat number of a diamond, the rarer it is and the higher the price. Weight is one of the important factors determining the value of a diamond. Color: The color of diamonds is divided into 23 color levels from colorless to light yellow, represented by the English letters D to Z.

3. Diamond grades are mainly distinguished according to four aspects: weight, color, clarity and cutting: Weight: The weight of diamonds is in carats (ct), and 1 carat is equal to 200 mg or 0.2 g. Diamond weight can be divided into seven grades, which are 0.30ct~0.39ct, 0.40ct~0.49ct, 0.50ct~0.69ct, 0.70ct~0.89ct, 0.90ct ~ 0.99ct, 00ct~50ct, and 50ct~00ct.

4. Cutting is an important factor affecting the fire color and shine of diamonds. The cutting levels are divided into Excellent, Very Good, Good, etc. N also does not directly represent the cutting level. Weight (carats): The weight of a diamond is in carats (ct). The greater the weight, the rarer the diamond and the higher its value. N has nothing to do with the weight of the diamond.

Diamond fluorescence grading-Diamond ring grading knowledge

Diamond fluorescence levels are mainly divided into N level, F level, M level, S level and VS level. The following is a detailed explanation of the definition of N-level fluorescence levels in diamonds: N-level means that there is no fluorescence reaction in diamonds. Characteristics: When observed under ultraviolet light, diamonds will not emit any fluorescent color. Value impact: Non-fluorescent diamonds are more pure in the eyes of some consumers, so the price may be higher.

The fluorescence level of diamond rings is mainly divided into five levels. The following is the specific classification and description: No fluorescence (None): Characteristics: Does not emit any visible light under ultraviolet light. Impact: Non-fluorescent diamond rings usually cost more because they are visually purer. Weak fluorescence (Faint): Characteristics: It emits weak visible light under ultraviolet light, which is usually difficult to directly observe with the naked eye and requires the assistance of professional instruments.

Diamond ring fluorescence refers to the phenomenon that diamonds emit light in other colors under ultraviolet radiation. They are common blue and yellow, and some may appear orange. Its fluorescence level is generally divided into five levels: None: Under ultraviolet irradiation, there is basically no fluorescence reaction. This type of diamond ring is of relatively high quality on the market and the price is usually relatively high. Faint: The fluorescence reaction is very weak and almost invisible to the naked eye.

Under the same 4C conditions (color, clarity, cutting, carat weight), fluorescence is inversely proportional to price.

When you buy diamond rings, most people know the classification of 4C levels of diamonds. The higher the level, the greater the value of the diamond.

Diamond color level table?

1. The color level of diamonds is divided into D, E, F, G, H, I-J, K-L, M, N-O, P-R, and S-Z from high to low. The color of most gem-grade diamonds is between colorless and light yellow, as follows: Grade D: Completely colorless, the highest color level among diamond colors and is extremely rare. This diamond is visually pure and without any perceptible tones. It is ideal for consumers seeking ultimate quality and perfect appearance, and is usually the most expensive.

2. Grade D: Completely colorless. This is the highest color level of diamonds. It is extremely rare and of excellent quality. Class E: colorless. Only gemstone identification experts can detect trace amounts of color, which is a very rare diamond. Class F: Colorless. A small number of colors can only be detected by jewelry experts, but they are still considered colorless and belong to high quality diamonds. Class G-H: Nearly colorless.

3, diamond color grade table is as follows: D grade: completely colorless. Diamonds have the highest color level, perfectly colorless, and relatively the highest rarity. Class E: colorless. Trace amounts of color in diamonds can only be detected by gemstone identification experts and are relatively rare. Class F: colorless. A small number of colors can only be detected by jewelry identification experts and are still considered colorless, high-quality diamonds. Grade G~H: Nearly colorless.

4. The diamond color rating table is as follows: Grade D: Completely colorless, the highest color level, extremely rare. Grade E: colorless, only gemstone identification experts can detect trace colors. It is a very rare diamond. Grade F: colorless, a small amount of color can only be detected by jewelry experts, but it is still considered colorless and belongs to high-quality diamonds. G-H grade: Nearly colorless and slightly colored when compared to higher grade diamonds, but diamonds of this grade still have a high value. Class I-J: Nearly colorless, slight color can be detected, and has high value.

What does diamond n/f mean?

f is the fluorescence intensity of the diamond under ultraviolet radiation. n is the fluorescence intensity of diamond. Diamond refers to polished diamond. Diamond is a natural mineral and the original stone of diamond. Simply put, diamond is a simple crystal composed of carbon formed under high pressure and high temperature conditions deep in the earth. Diamonds are beautiful and rare. They are a symbol of love and loyalty, representing eternal and unbreakable love.

Diamond colors are divided into eleven grades from D to N, with D-grade colorless diamonds being the rarest and most expensive. The color levels are sorted as follows: - D, E, F: colorless level, the highest quality. - G, H: Nearly colorless, above average quality. - I, J: Slightly yellow level, average quality. - K, L, M, N: The color is yellow and has no collectible value.

Grade F: colorless, a small amount of color can only be detected by jewelry experts, but it is still considered colorless and belongs to high-quality diamonds. G-H grade: Nearly colorless and slightly colored when compared to higher grade diamonds, but diamonds of this grade still have a high value. Class I-J: Nearly colorless, slight color can be detected, and has high value. K-M level: Dark color, poor fire color.

Grade F: colorless, jewelry experts can detect a small amount of color, high-quality diamonds.

Color grading of diamonds

The tone of yellow diamonds is divided into three grades from high to low: yellow, slightly greenish yellow, and slightly orange-yellow. The color of yellow diamonds is pure yellow and there will be no other shades. The color of greenish yellow is yellow with visible green to the naked eye, and the color of orange is yellow with orange tones. The lightness of yellow diamonds is divided into bright V bright V dark V 3 from high to low.

The color grading of diamonds is divided into 23 grades according to the GIA color grading table, from completely colorless D to Z with tan. Among them, D.E.F. grade belongs to the colorless range, G.H.I. J belongs to the nearly colorless range, K.L. M is slightly pale yellow, and below N is light yellow. Those below Z are called colored diamonds and are very expensive.

The color grade of diamonds is mainly divided into the following ten types from low to high: N-grade: Diamonds show a more obvious yellow color. Grade M: Diamond has a high yellow content and is visible to the naked eye. Grade K: Diamonds can be seen directly in yellow and are of poor quality. Grade J: A little yellow can be seen in diamonds and begin to have certain investment value. Level I: Similar to Level J, the yellow color is weak, but it is still perceptible and has limited investment value.

NGTC is the only partner of the Gemological Institute of America (GIA) in the mainland of China. Its diamond color classification mark adopts a similar method to GIA. It is divided according to the International Diamond Color Registration Table, generally represented by the letters D-Z. It is divided into 12 levels, which are divided into seven categories from light to deep.