When most people buy diamonds, the most important consideration is how to buy a diamond with good weight and good quality at the most reasonable price.
When evaluating diamonds, people often use 4C as the standard, but the value of diamonds does not depend only on 4C. Since many indicators cannot be observed by the naked eye and are not well known, most of them do not have much influence on the overall quality of diamonds. .
The Fluorescence indicator is a clear example. Although fluorescent diamonds are slightly lower in price than non-fluorescent diamonds, they do not degrade their overall quality. In fact, different levels of fluorescence are only discernible by professionally trained jewellery professionals. The flesh is not felt in natural light, except in the summer sun with strong ultraviolet light, the diamond with strong fluorescence can only feel the presence of fluorescence.
Natural colored diamonds exhibit different colors of fluorescence under intense ultraviolet light
What is the fluorescent indicator of diamonds?
In theory, a pure colorless diamond should have no complex elements inside, but the diamond is almost invisible in nature. Diamonds, especially jewellery-grade diamonds, are formed by various internal composite elements after millions of years of geological changes. When determining the type of diamond, it is often based on the elements contained in the diamond. For example, diamonds with fluorescence generally contain nitrogen, boron and aluminum atoms.
Fluorescence is a natural indicator of diamonds. The color is generally determined by the chemical composition contained in the interior. For example, the fluorescent colors of colored diamonds are blue, yellow, white, orange, green and pink. The fluorescent color of colorless diamonds is generally yellow or blue.
The fluorescence intensity of diamonds can be divided into different grades. According to the GIA standard fluorescence intensity, it can be divided into the following five grades: no, weak, medium, strong, and strong.
If you don't have a fluorescent UV lamp around you, you can use a regular black light (near-ultraviolet light) to see the diamond's fluorescence.
The fluorescence intensity of the diamond in the figure is from left to right: no, micro, medium, strong, strong
How is fluorescence formed?
Millions of years ago, under the extreme heat and pressure of more than one hundred kilometers below the surface of the earth, carbon formed diamonds over time. These gemstones absorbed each other from other minerals during the formation process. Trace elements, these trace elements make the diamond different colors and fluorescence.
At present, the ratio of fluorescent diamonds to non-fluorescent diamonds is about 7:20, that is, about 35 of the 100 diamonds are fluorescent diamonds, of which only 10% of the most intense fluorescent diamonds can change the appearance of diamonds under ultraviolet light. Let the diamond look different when it is peaceful.
The effect of fluorescence on diamonds
When you buy a diamond, most diamond retailers will tell you that fluorescent diamonds are not as good as non-fluorescent diamonds, which makes fluorescent diamonds generally cheaper than non-fluorescent diamonds, but when you pick diamonds, we hope you can pay attention to the following:
1. The fluorescence of a diamond can only be seen with the naked eye under strong ultraviolet light. Even a very high-intensity fluorescent diamond has only a weak fluorescence when exposed to direct sunlight.
2. The effect of fluorescence on diamonds depends on the color and fluorescent color of the diamond. Sometimes the fluorescent color of the diamond will add extra charm to the diamond.
In addition, since the amount of fluorescence affects the quality of the diamond, for the consumer, this means that you can buy a good quality colorless diamond at a slightly lower price, but the effect on some rare colors of colored diamonds. Not big. The price of a fluorescent diamond depends on the intensity of the fluorescence. If you are planning to buy a fluorescent diamond, this means you have a certain bargaining space.
The effect of fluorescence on diamonds depends primarily on the type of diamond and the intensity and color of the fluorescence, but sometimes fluorescence can improve the overall quality of a diamond, even if it is not as expensive as a non-fluorescent diamond.
For example, two cases below:
Case 1: A colorless diamond with "blue" fluorescence (color between "IJ"), under certain lighting conditions, its own fluorescence will increase the color of the diamond, allowing the whole diamond The color quality is increased by a height.
Case 2: A yellow diamond with a "strong green fluorescence" (very intense "green" or "yellow green"), under certain lighting conditions, the fluorescence that comes with it will be colored diamonds. The color of the modification (green) affects the brightness of the main color of the yellow diamond.
If the diamond you buy is for jewelry inlays, then you need to understand that the fluorescence of the diamond will change slightly in different environments, but this does not prevent you from designing a beautiful jewelry. If you still have questions, you can consult a professional.
What effect does fluorescence have on diamond prices?
In the end, the quality of diamonds is good or bad, and there is still controversy in the academic world. Regardless of whether the effect of fluorescence on the diamond is a disadvantage, the diamond's fluorescence shape depends entirely on the color of the diamond and the color of the flash.
In nature, not all diamonds fluoresce. Now, the price effect of fluorescence on diamonds is mainly reflected in the fluorescence intensity. Diamonds with “micro†weak fluorescence are almost unaffected when sold, if it is “ Medium "fluorescent diamonds" are determined by the nature of the diamond at the time of purchase. But diamonds with "strong" or "very strong" fluorescence will be significantly less expensive than non-fluorescent diamonds.
Colorless diamond
Fluorescent colorless diamonds are mainly determined by color grade and fluorescence grade. Colorless diamonds generally emit blue fluorescence. If the grade of colorless diamonds is low, the blue fluorescence of the colorless diamonds may increase. The color of a diamond. However, if the colorless diamond is of a higher grade, its own yellow fluorescence may reduce the clarity of the diamond.
To some extent, fluorescence does reduce the clarity of high quality white diamonds under the right light.
Colored diamond
For natural colored diamonds, fluorescence does not reduce its color intensity. Interestingly, the light from some colored diamonds blends with its own color, and in its proper light, its own fluorescence can even bring incredible color changes to the diamond.
Natural yellow diamonds generally have fluorescence, but the fluorescence intensity is weak. When you purchase a yellow diamond, you can ask the merchant about the fluorescence intensity of the diamond. In general, the yellow diamond with fluorescence looks a bit brown or milky white, but consumers don't have to worry because the fluorescence is under normal conditions. The naked eye is unobservable, but the price is cheaper than the non-fluorescent diamond
It is difficult to find diamonds without fluorescence in natural pink diamonds, especially Argyle diamonds, even with strong fluorescence, usually does not affect the value of pink diamonds.
Among the natural blue diamonds, there are almost no diamonds with fluorescence. Even if one is found, it is largely a blue-green diamond. The fluorescence is very weak and can be ignored.
For fluorescence, people's attitudes are different. Some diamond collectors are looking for diamonds that produce this unique effect. For example, diamonds with red fluorescence are very popular because they are extremely rare. If you are unsure about the purchase, you can consult the jeweler's advice. Whether fluorescence has a positive or negative effect on diamonds, the change in fluorescent diamonds is amazing under ultraviolet light.
In the next issue, let's take a look at the fluorescent effect of the gift diamond necklace that Napoleon I gave to his wife, Mary Louis, under ultraviolet light.
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