Results 21 to 30 of about 354 (163)
Gemological Characteristics of Lvwen Stone and Its Color Genesis
Minerals, 2022 “Lvwen stone” is a yellow-green carbonate jade gemstone. In this study, the gemological characteristics and color genesis of Lvwen stone were investigated using conventional gemological testing methods and analytical techniques, such as X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), ultraviolet–visible spectroscopy (UV–VIS ...
Zhendong Liu +10 more
openaire +2 more sources
Crystals, 2023 The orange fluorescence of scapolite has been confirmed to be caused by (S2)−, but the frequent blue fluorescence in gem-quality scapolite has not been well explained.
Yinghua Rao +3 more
doaj +2 more sources
Gemological Characteristics and Trace Chemical Element Analysis of Emerald in Kafubu, Zambia
CrystalsThis study systematically analyzed the color characteristics, microscopic inclusions (including fluid and mineral inclusions), spectral properties, and chemical composition of emerald samples from Kafubu, Zambia using infrared spectroscopy, UV–visible ...
Yiwei Jiang +3 more
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Spectroscopic Characteristics and Coloring Mechanisms of Different Colored Spinels from Myanmar
Crystals, 2023 Spinel is a common gemstone that has attracted the attention of gemologists worldwide because of its high refractive index, rich colors and brilliant hues. Myanmar is an important source of spinel. The present paper provides a systematic characterization
Lei Zhang, Kui He, Qingfeng Guo
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Gemological characteristics of jewelry-ornamental septaria of the Ulyanovsk region
Известия высших учебных заведений: Геология и разведка, 2019 Septaria of the Ulyanovsk region are high-quality jewelry and ornamental material. Septaria are associated with lower Cretaceous sediments and are located in the coastal cliffs and the beach area of the Volga river.
D. A. Petrochenkov
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Crystals, 2023 Agate attracts the attention of gem mineralogists because of its variable colors. The color of agate is closely related to its naming and classification, so it is necessary to study the color and mineral origin of agate.
Sixue Zhang +6 more
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Gemological characteristics and inclusions of green rutilated quartz from Huanggangliang, Inner Mongolia. [PDF]
RSC AdvNormally, various minerals exist in quartz as inclusions.
Zhao S +5 more
europepmc +3 more sources
Gemmological, Spectroscopic, and Origin Description Studies of Tourmaline from Yunnan, China [PDF]
MoleculesThe Nujiang region of Yunnan is by far the richest tourmaline-producing mining area in China. Since the discovery of the tourmaline-bearing deposit in Yunnan Province in 1980, there have been few comprehensive gemmological studies of this deposit ...
Qishen Zhou +4 more
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Mineralogical and Gemological Characteristics and Color Genesis of Zibai Jade
CrystalsZibai Jade is a recently identified hydrogrossular-dominant jade originating from Shaanxi Province, China. It constitutes a polymineralic aggregate composed predominantly of hydrogrossular, with minor proportions of vesuvianite, diopside, chlorite ...
Linhui Song +3 more
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