The Fluorescence indicator refers to the intensity of colored light such as blue or yellow light that a diamond emits under intense ultraviolet light. That is to say, under natural light, we can't feel it, unless there is a strong fluorescent diamond in the strong summer sun, we can feel the presence of fluorescence.
1. The bare diamond fluorescence is divided into Non (none), F (weak), Med (medium), S (strong), and VS (very strong) according to the GIA standard. The diamond's fluorescence level is greater than the D-G color. The price of diamonds above VS level of 50 points or more has a great influence. The medium fluorescence will affect the price by 5%-10%, the strong fluorescence should be 30% or more cheaper, and the strong fluorescence is basically about 35% lower than the price without fluorescence. .
2. The stronger the fluorescence, the greater the influence of the color of the diamond that is nearly colorless. Under the illumination of the light, it will produce a squeaky feeling (clear under the 10x mirror), which affects the brightness and transparency of the high-color diamond. For diamonds below J color, although blue fluorescence can make the diamond white, the price will still be 5%-10% lower. A small diamond with a score of less than 20 points does not affect the price. More than 20 points have a certain price impact. Domestic testing centers do not grading comments on fluorescence because of the level of detection, but because most of the diamonds are imported, the price changes according to the pricing standards of the international market. Therefore, many strong fluorescent diamonds and non-fluorescent diamonds sell the same price, which is a big loss for consumers.
3, in order to ensure that your diamond price is worthwhile, if your diamond is above 20 points, you must ask the fluorescent level of the seller's diamond, and at the same time receive the goods to compare the transparency of the diamond under strong light and soft light. . If the transparency of a diamond is much worse under strong light, your diamond is likely to be strongly fluorescent. If the diamond is very fluorescent, it will look foggy under the light.
4. Other suggestions: After the yellow color of the yellow color diamond, the appropriate blue fluorescence can cover off the yellow color of a part of the diamond, making the diamond look whiter and the price is more suitable, but don't buy a strong fluorescent diamond, but also special Pay attention to the high-quality diamond G color and try not to have fluorescence, even weak fluorescence.
GUANGZHOU CHEER INDUSTRY CO LTD , https://www.fashionwholesale2.com