摘要
以日常检验中收到的辐照改色处理蓝色钻石为研究对象,通过对其光谱学特征测试分析,确定此类钻石的鉴定特征。红外光谱显示钻石为Ⅰa型,具1 450 cm~(-1)处与辐照退火相关的H1a中心。紫外-可见光谱及光致发光光谱显示明显GR1中心,以及较弱ND1中心、3H中心和N3中心。经综合分析,两件样品为天然成因钻石,经人工辐照低温退火处理,其蓝色主要来自GR1中心。
Based on the analysis of spectral characteristics of colour-treated blue diamonds from the routine tests,the identification of this kind of diamonds is confirmed.The infrared spectra reveal that the diamonds are typeⅠa,and show H1a center related to radiation and annealing,which is reflected by a characteristic peak at 1450 cm-1.UV-Vis-NIR spectra shows obvious GR1 center and weak centers including ND1 center,3H center and N3 center.According to the comprehensive analysis,the two samples are diamonds of natural origin.They have been subjected to irradiation followed by low-temperature annealing.The blue colour is mainly induced by GR1 center.
作者
徐速
夏玉梅
曲蔚
XU Su;XIA Yumei;QU Wei(Chengdu Institute of Product Quality Inspection Co.Ltd.,Chengdu 610100,China;Sichuan Institute of Product Quality Supervision&Inspection,Chengdu 610100,China;National Gold-Silver Gem&Jewelry Quality Inspection Center(Sichuan),Chengdu 610000,China)
关键词
蓝色钻石
辐照低温退火处理
H1a中心
GR1中心
光谱学特征
blue diamond
irradiated and low-temperature annealing
H1a center
GR1 center
spectroscopic characteristic
