钻石的荧光及鉴定（Fluorescence and identification of diamond）.docVIP

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钻石的荧光及鉴定（Fluorescence and identification of diamond）.doc

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钻石的荧光及鉴定（Fluorescence and identification of diamond） Fluorescent light, English Fluorescence, refers to the intensity of blue light emitted by a diamond under intense ultraviolet light. Internationally, the level of Fluorescence from high to low is negligible (almost no), none (invisible), inert (weak), faint (medium), blue (blue), strong, blue (especially blue). Diamonds at the strong blue level are cheaper than negligible or none levels The level of fluorescence of D-G diamond color is more than 50 points above the level VS diamond price impact, generally weak fluorescence can affect the price of around 5%, about 7% will moderate fluorescence 10%, strong fluorescence for the higher color effect is larger, up to 30% or more. Especially strong fluorescence basically no fluorescence than low prices around 35%, greater impact on general 1-2 about DEF carat diamond prices, the stronger fluorescence for the more approximate colorless color to create a hazy feeling (more clearly in 10 magnification), transparent effect of high color diamonds, the color is less than J diamond, although fluorescence can make significant white diamonds, but still the price will be low 5%-10%, low color to M color, fluorescence has been basically on the price not what effect, small diamonds below 20 points also basically do not affect the price of 20 - 50 points for high purity VVS diamond also has certain influence the price. 1. fluorescent Fluorescence index refers to the diamond under strong ultraviolet light, such as blue or yellow light intensity. This sentence implies what meaning, that is to say, in natural light, do not feel it, except in the strong ultraviolet summer sun, has a strong fluorescence diamond, feel the existence of naked eye fluorescence. In addition to this situation, fluorescence has no effect on wear. 2., not all diamonds have fluorescence, but it is true that most diamonds have a little fluorescence, the international test of diamonds is to fluorescence indicators w