粉色-紫红色白云石的宝石学特征研究

Study on gemological characteristics of pink-purplish red dolomite

近期,笔者在检测中遇到一种粉色-紫红色的样品,外观与菱锰矿、蔷薇辉石、苏纪石等类似,为了确定该样品的品种,进行了红外光谱、X射线粉末衍射分析,结果表明,这种粉色-紫红色的样品主要矿物为白云石,可含有蓝铜矿、石英等其他矿物。利用X射线荧光光谱仪和紫外-可见吸收光谱仪对样品进行分析,发现粉色-紫红色部位明显含有钴(Co)元素,半定量分析钴(Co)元素含量为3.17%;蓝色部位明显含有铜(Cu)元素;紫外-可见吸收光谱具480nm处拐点,530~540nm较强的宽吸收带,部分样品在665nm处具弱吸收带。

Recently,the authors encountered a pink-purplish red sample in the detection,which is similar to rhodochrosite,rhodonite and sugilite.To determine the variety of the sample through the analysis of infrared spectrum and X-ray powder diffraction.The results show that the main mineral of this pink-purplish red sample is dolomite,which can contain azurite,quartz and other minerals.X-ray fluorescence spectrometer and ultraviolet visible absorption spectrometer are used to analyze the sample,it is found that the pink-purplish red part contains cobalt(Co)obviously and the cobalt content is 3.17%by the semi quantitative analysis,the blue part contains copper(Cu)obviously,the ultraviolet visible absorption spectrum has a inflection point at 480nm,a wide absorption band at 530-540nm,and weak absorption band at 665nm for some samples.