淡水养殖珍珠以其美丽多样的颜色而闻名，目前市场中常见白色、桔色、粉色及紫色品种，其中紫色淡水珍珠以其独特的颜色受到消费者的追捧，市场中也出现了紫色染色淡水珍珠。本文论述了四种紫色染色珍珠的鉴定依据：UV-Vis光谱分析中存在245和300nm的异常吸收峰；超短波紫外灯下呈斑驳状黄色、黄橙色荧光；化学成分分析中Ag元素的存在；473nm激光激发下，4000-8000cm−1范围的PL强荧光背景。这些方法可以为鉴别紫色染色淡水珍珠提供高效、无损的技术支持。

In the present study, we collected and investigated spinels from the Man Sin deposit in Myanmar using standard gemological testing, microscopic observation, EDXRF, and Raman spectrometry. The color observation was performed under various lighting conditions to show color differences. A very high Cr/Fe ratio is linked with exceptionally strong red fluorescence. Microscopic observation and Raman spectroscopy identified mineral inclusions of colorless phlogopite, molybdenite, hauerite, native sulfur, and calcite. Man Sin spinels are typical Fe– and Zn–poor spinels. Binary and ternary diagrams were used to discriminate each deposit (i.e., Man Sin, Mogok, and Namya in Myanmar) with high reliability. Jedi spinel fever in the Asian market, due to their unique neon color appearance and exceptionally strong fluorescence, is also discussed.

The color of Tahitian pearls is various, thus, it is necessary to confirm their color origin. A combined technique of UV-Vis-NIR spectroscopy, Raman, Ultrashort ultraviolet light and EDXRF is used to determine whether the Tahitian pearls have been treated. In this article, we analyzed the testing results of Tahitian pearls with different body colors.