摘要
青金石是一种含有多组分矿物的宝石品种,为了研究青金石中的矿物组分种类,笔者收集了不同深浅蓝色调的青金石进行研究.并对青金石进行了常规宝石学测试、超景深显微镜观察、DiamondviewTM荧光观察、显微红外光谱、激光拉曼光谱测试.测试结果表明,青金石样品的组成矿物包括青金石、透辉石、方解石、磷灰石、方柱石、云母、重晶石、榍石、黄铁矿等.这些矿物在显微镜下及DiamondviewTM下呈现不同的形态及荧光特征,青金石为蓝色、紫蓝色矿物,DiamondviewTM下荧光颜色为深蓝色;透辉石、方解石、磷灰石、方柱石、云母、重晶石均为无色矿物,DiamondviewTM下透辉石可呈蓝白色、浅灰色、红色、紫红色及橙色荧光;方解石无荧光,当紫外光强度增强时呈弱红色荧光;磷灰石呈蓝色荧光;方柱石呈深灰色荧光;云母呈黄绿色荧光;重晶石呈灰紫色荧光;榍石为白色矿物,具金刚光泽,DiamondviewTM下呈灰色荧光;黄铁矿呈铜黄色,具金属光泽,DiamondviewTM下呈荧光惰性.其中磷灰石、重晶石是本文测试首次发现,在前人研究中均未提及到.DiamondviewTM在确定青金石的矿物组成时发挥了较重要的作用.
Abstract
The Lapis lazuli is a kind of gemstone which contains a variety of minerals.In this paper,the lapis lazuli samples of different color are investigated using general gemological testing methods,Ultra-Depth microscope,DiamondviewTM,Micro-infrared spectrometer,Laser Raman spectrometer,for distinguishing the mineral compositions of the Lapis lazuli samples.The results show that the lapis lazuli include minerals such as lapis lazuli,diopside,calcite,apatite,scapolite,mica,barite,sphene and pyrite.These minerals appear different shape and fluorescence characteristics under the microscope and DiamondviewTM.The lapis lazuli is blue and purplish blue,its fluorescent color measured by DiamondviewTM is dark blue;the diopside,calcite,apatite,scapolite,mica,barite are colorless,the fluorescent color of diopside measured by DiamondviewTM can be bluish white,light gray,red,purplish red and orange;the calcite is non-fluorescent,but its fluorescent color can be weak red by enhanced fluorescence intensity;the fluorescent color of apatite measured by DiamondviewTM is blue;the fluorescent color of scapolite measured by DiamondviewTM is dark gray;the fluorescent color of mica measured by DiamondviewTM is yellowish green;the fluorescent color of barite measured by DiamondviewTM is grayish purple;the sphene is white,with adamantine luster,its fluorescent color measured by DiamondviewTM is gray;the pyrite is brassy yellow,with metallic luster,and it is non-fluorescent measured by DiamondviewTM.The apatite,barite are first discovered in this paper.DiamondviewTM plays an important role in finding the mineral compositions of Lapis lazuli.
基金项目
NGTC科研基金项目实验室疑难问题研究(NGTC2019016)
NETL
NSTL
万方数据