翡翠为一种珍贵的玉石。 不同品级的翡翠价值差异巨大, 翡翠经充填、 染色等处理以提高外观质量, 并冒充天然翡翠。 鉴别翡翠就显得非常必要。 全面收集了市场上常见的A, B, C, 不同颜色B+C货翡翠样品, 在常规宝石学特征描述的基础上, 进行了三维荧光光谱测试。 三维荧光光谱技术是近年发展起来的一门新的荧光分析技术, 该技术在宝石学方面还未得到广泛应用。 目前主要依赖红外光谱对经充胶处理的宝石进行无损检测, 其测试结果会受到样品表面抛光程度及样品透明度的影响, 三维荧光光谱技术对样品抛光程度及透明度要求不高, 在一定程度上能避免红外光谱由于抛光程度、 透明度对测试结果的影响, 采用三维荧光光谱技术对市场上不同处理类型翡翠样品的三维荧光光谱特征进行分析, 结果显示: 除A货翡翠没有荧光反应外, B货翡翠荧光中心多集中在380 nm( λ_ex)/440 nm( λ_em), 在长波紫外灯下具有中强蓝白色荧光。 C货翡翠荧光中心集中在365 nm( λ_ex)/443 nm( λ_em), 在长波紫外光下呈弱紫色荧光, B+C紫色翡翠荧光中心集中在365( λ_ex)/443 nm( λ_em), 长波紫外光下具有蓝紫色荧光。 B+C绿色翡翠荧光峰值主要集中在290( λ_ex)/308 nm( λ_em), 短波紫外光下具有弱蓝白色荧光。 B+C黄色翡翠荧光峰值集中在335( λ_ex)/377 nm( λ_em), 长波紫外光下具有弱绿色荧光。 B+C红色翡翠荧光峰值为290( λ_ex)/308 nm( λ_em), 长波紫外光下具有弱绿色荧光。 在255 nm激发光源下时, 不同处理类型翡翠发光范围集中在紫-蓝区域, 发光中心波长呈B+C绿色翡翠>B货翡翠>C货翡翠, 在365 nm的激发光源下, 翡翠样品的荧光明显强于短波, 不同处理类型翡翠发光范围集中在紫-绿区域, 发光中心波长呈B+C黄色翡翠>B+C绿色翡翠>B+C紫色翡翠>C货翡翠>B货翡翠的大小关系。 三维荧光光谱有助于表征树脂, 有机染料及金属染剂, 它能快速有效鉴别不同方法处理的翡翠类型。

Jadeite is a kind of precious jade. The value of different grades of jadeite varies greatly. Jadeite is treated by filling, dyeing, etc. to improve the appearance quality, and it is pretended to be natural jadeite. It is very necessary to identify jadeite jade. In this paper, the samples of A, B, C, B+C jadeite with different colors on the market are collected comprehensively. Based on the description of conventional gemological characteristics, the three-dimensional fluorescence spectra are tested. Three-dimensional fluorescence spectroscopy is a new fluorescence analysis technology developed in recent years. It has not been widely used in gemology. At present, the non-destructive testing of the gem filled with glue mainly depends on the infrared spectrum. The test results will be affected by the polishing degree of the sample surface and the transparency of the sample. The three-dimensional fluorescence spectroscopy technology has no high requirements on the polishing degree and transparency of the sample, to a certain extent, it can avoid the influence of the polishing degree and transparency of infrared spectrum on the test results,three-dimensional fluorescence spectroscopy technology is used to analyze the three-dimensional fluorescence spectrum characteristics of different types of jadeite samples on the market, Except that A jadeite has no fluorescence reaction, the fluorescence center of B jadeite is mostly concentrated at 380 nm( λ_ex)/440 nm( λ_em). It has moderate, strong blue-white fluorescence under long-wave of the ultraviolet lamp, The fluorescence center of C jadeite is concentrated at 365 nm( λ_ex)/443 nm( λ_em). It shows weak purple fluorescence under long and short-wavelength ultraviolet light. The fluorescence center of B+C purple jadeite is concentrated at 365( λ_ex)/443 nm( λ_em), It has blue-violet fluorescence under long-wavelength ultraviolet light, the fluorescence peak of B+C green jadeite is mainly concentrated at 290( λ_ex)/308 nm( λ_em), It has weak blue-white fluorescence under short wave ultraviolet light, the fluorescence peak of B+C yellow jadeite is concentrated at 335( λ_ex)/377 nm( λ_em), Weak green fluorescence appears under long-wavelength ultraviolet light, the fluorescence peak of B+C red jadeite is 290( λ_ex)/308 nm( λ_em). Weak green fluorescence under long-wavelength ultraviolet light. Under the 255 nm excitation light source, the luminescent range of jadeite jade with different treatment types is concentrated in the purple-blue region, the center wavelength of different processing types of jade is B+C green jadeite >B jadeite >C jadeite, Under the 365 nm excitation light source, the fluorescence intensity of jadeite samples is obviously stronger than that of short wave, and the luminescence range of jadeite jade with different treatment types is concentrated in the purple-green region, the center wavelength of different processing types of jadeite is B+C yellow jadeite >B+C green jadeite >B+C purple jadeite >C jadeite >B jadeite. Three-dimensional fluorescence spectroscopy is helpful to characterize resin, organic dyes, metal dyes. It can quickly and effectively identify different types of treated jadeite.