新疆“金丝玉”的宝石学特征及光谱学特征分析

Studyon Gemological and Spectroscopic Characteristics of"Jin-si Jade"from Xinjiang

近年来,新疆“金丝玉”的销售市场不断扩大,受到广大消费者青睐,但由于兴起的时间较短,对新疆“金丝玉”的认识还不够全面,需要对其矿物组和颜色成因进行厘定。该研究收集了来自新疆杜热地区的“金丝玉”,采用X射线荧光光谱(XRF)、红外光谱(IR)和紫外-可见光光谱(UV-Vis)分析等方法,进行系统地宝石学特征、光谱学特征及颜色成因分析。结果显示,新疆“金丝玉”为一种含氧化铁矿物的石英质玉石,成矿过程中曾受到动力变质和变质重结晶作用影响;样品的黄色调与针铁矿有关,而褐红色调则由褐铁矿所致。

Thesales market of“Jin-si Jade”from Xinjiang continues to expand for the favorite of the consumers.Because of the lack of mature in market and acknowledgement on characteristics,it is necessary to determine the mineralogic components and color mechanism of“Jin-si Jade”.XRF,Mid FT-IR,and UV-Vis analysis methods are conducted on“Jin-si Jade”samples from Xinjiang,in order to understand systematic gemological characteristics,spectroscopic characteristics and color mechanism.The result shows that“Jin-si Jade”from Xinjiang is a kind of quartzitic jade containing iron oxide mineral,which may be influenced by dynamism and metamorphic recrystallization during the mineralization process.The yellow and brownish red color in“Jin-si Jade”are related to goethite and hematite,respectively.