摘要
挑选了寿山石高山系月尾矿段月尾石和旗山系老岭矿段老岭石为研究对象,通过常规宝石学测试、红外光谱、X射线粉末衍射、拉曼光谱、扫描电子显微镜等测试研究手段对红色月尾石和老岭石的宝石学特征、化学成分、矿物组成、颜色成因等进行研究。结果显示,这两个产地的寿山石主要成分均为叶蜡石,月尾石中还含有硬水铝石,老岭石中含有金红石、锆石、白云母、绿泥石。红色月尾石和红色老岭石的颜色均为杂质矿物致色,月尾石为赤铁矿致色,老岭石为赤铁矿、金红石共同致色,以赤铁矿为主。
Larderite is one of the most f warded and respected by all walks of lif ever-increasing demand of the larderite, alogical properties were carried out. amous carving stones in China, which is widely ree for its gorgeous colour and fine texture. With the extensive researches on its gemmological and minerThis paper investigated two specific kinds of red larderite called Yuewei stone and Laol- ing stone on their gemmological and mineralogical properties, chemical compositions, mineral components and origin of colour by using conventional gemmological instruments, XRD, Fourier transform infrared spectroscopy （FTIR）, laser Raman spectroscopy and environmental scanning electron microscope （ESEM） with energy dispersive spectrometer （EDS）. Differences exsit between Yuewei stone and Laoling stone in visual inspection. Com- pared with Laoling stone, Yuewei stone is lighter in colour, milder in luster and clearer in transparency. Bright red spots and dark red veins can be easily seen with naked eyes in Yue- wei stone while only red veins in Laoling stone. Flash of cleavage plane can be seen in Yue- wei stone which is then identified as diaspore in further study. While light yellow and yel- lowish white minor minerals can be seen in Laoling stone, which is later identified as rutile in further study. The major ingredient of both stones is pyrophyllite. Observed by microscope, it is col- ourless and the crystal is very tiny, with no apparent boundary, and its interference colour is secondary blue and green. Characteristic peaks at 9. 132, 4. 579, 2. 295, 3. 056 A of pyrophyllite can be seen in XRD results. Detailed research shows that pyrophyllite in Yuewei stone is 2M1 type, while in Laoling stone a mix of 2M1 type and 1Tc type. IR spectra show that the spectra of both stones are similar, with 3 675 cm 1 AI-（OH） stretching vibration, 1 122 cm-1 Si OH stretching vibration, 1 069 cm 1 Si-O--Si stretc- hing vibration, 949 cm-1 AI--（OH） in-plane swing, 853, 835, 813 cm 1AI--（OH） out-of- plane swing and 540
出处
《宝石和宝石学杂志》
CAS
2016年第1期15-23,共9页
Journal of Gems & Gemmology
基金
湖北省自然科学基金(2015CFB269)
中国地质大学(武汉)珠宝学院基金(CIGTXM-201404)
