岩石矿物学杂志2024，Vol.43Issue(3)：685-696,12.DOI:10.20086/j.cnki.yskw.2024.0316
巴西金刚石的宝石矿物学特征
The gemological and mineralogical characteristics of Brazilian diamond
李雨璇 1黄颖 2刘迎新1
作者信息
- 1. 中国地质大学(北京)珠宝学院,北京 100083
- 2. 中国地质大学(北京)珠宝学院,北京 100083||大连银行股份有限公司北京分行,北京 100026
- 折叠
摘要
Abstract
The Brazilian diamond samples were analyzed by conventional gemological testing instruments combined with Fourier transform infrared spectrometers(FTIR),laser Raman spectroscopy,and Diamond ViewTM.The re-sults revealed that the surface microforms of Brazilian diamonds are extremely diverse,featuring various growth mounds,trigonal,hexagonal,or irregular fusion pits,as well as plastic deformation slip lines.The Brazilian dia-mond samples are predominantly composed of the ⅠaAB type,accounting for over 90％of the total samples.It ex-hibits a nitrogen content ranging from 400×10-6～1 700×10-6 and a B core conversion rate between 15％and 66％.These findings indicate that Brazilian diamond samples are characterized by a high nitrogen content and a low to moderate degree of nitrogen aggregation.Raman spectroscopy analysis shows that there is residual compressive stress or poor crystallinity inside the sample.Diamond ViewTM luminescence images reveal blue and yellow-green fluorescence is popular in Brazilian Ⅰ aAB diamonds.Type Ⅰ aB diamonds exhibit blue fluorescence with green hues and an uneven blue fluorescence.The Type Ⅱ a diamond samples exhibit dark orange and blue fluorescence.关键词
金刚石/宝石学特征/谱学特征/荧光Key words
diamond/gemological characteristics/spectroscopic characteristics/fluorescence分类
天文与地球科学引用本文复制引用
李雨璇,黄颖,刘迎新..巴西金刚石的宝石矿物学特征[J].岩石矿物学杂志,2024,43(3):685-696,12.
