I saw a big diamond in Langfang shopping mall, but compared with similar diamonds next to it, this diamond looks a little white. What is this for?

In recent years, some websites have publicized the influence of fluorescence on diamond prices. What is the fluorescence of diamond, and how much does it affect the price of diamond?

According to GIA standard, the fluorescence of 1 loose diamond can be divided into five grades: Non (none), f (weak), Med (medium), s (strong) and VS (very strong). The fluorescence grade of diamonds has a great influence on the price of diamonds with D-G color above 50 points and VS grade above, and moderate fluorescence will affect the price by 5%- 10%.

The stronger the fluorescence, the greater the influence on the almost colorless color, and the hazy feeling (10 times clearer under the mirror) will be produced under the light irradiation, which will affect the brightness and permeability of high-colored diamonds. For diamonds below J color, although blue fluorescence can make diamonds appear white, the price will still be 5%- 10% lower. Small diamonds below 20 cents basically do not affect the price. More than 20 points have a certain price impact. Domestic testing centers do not grade and comment on fluorescence because of the fixed testing level, but because most diamonds are imported, the price changes with the pricing standards in the international market. Therefore, many diamonds with strong fluorescence sell at the same price as diamonds without fluorescence, which is a great loss to consumers.

In order to ensure the value of your diamond, if your diamond is above 20 points, be sure to ask the seller about the fluorescence grade of the diamond, and compare the transparency of the diamond under strong light and soft light after receiving the goods. If the permeability of a diamond is much worse under strong light, then your diamond is likely to have strong fluorescence. If cobalt stone has strong fluorescence, it will look foggy under the light.

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