Results 11 to 20 of about 354 (163)
Gemological and Mineralogical Studies of Greenish Blue Apatite in Madagascar
Crystals, 2022 Madagascar is known as the ‘Island of Gemstones’ because it is full of gemstone resources. Apatite from Madagascar is widely popular because of its greenish blue Paraiba-like color. This study analyzes apatite from Madagascar through standard gemological
Zhi-Yi Zhang +3 more
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Inclusions and Gemological Characteristics of Emeralds from Kamakanga, Zambia
Minerals (Basel, Switzerland), 2023 Currently, Zambia is one of the world’s major emerald-producing countries. In this study, emerald samples from Kamakanga, Zambia, were systematically analyzed by standard gemological tests, microscopic observation, Raman spectroscopy test of mineral inclusions, and fluid inclusions.
Xiao-Yan Yu, Yu Xiao-Yan
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Study on Gemological Characteristics of Blue Sapphires from Baw-Mar Mine, Mogok, Myanmar
Crystals, 2021 This paper employs an X-ray powder crystal diffractometer (XRD), an X-ray fluorescence spectrometer (XRF), an ultraviolet-visible-near infrared spectrometer (UV-Vis-NIR), a Fourier infrared spectrometer (FTIR), and a laser Raman spectrometer to ...
Siming Chen +4 more
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The Gemological Characteristics of Chinese Peridot
Gems & Gemology, 1986 Figzzre 1. Two of the rough peridot nodrlles froin Chino that were used in this study. The larger measures 20.6 x 13.7 x 10.1 m m and weighs 23.71 ct. Photo O Tino Hammid. found in San Carlos, Arizona, which also occurs in basalt (Koivula, 1981)) no well-formed single crystals of rough peridot have been found in the Chinese deposits.
C W Fryer
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Crystals, 2023 The geographic origin determination of ruby is increasingly important in the gem trade and geological research. Unlike metamorphic-related ruby, the rarer basalt-related ruby has gained significant attention, especially from Thailand, a major producer of
Enqi Li, Bo Xu
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Gemological and Chemical Characterization of Gem-Grade Peridot from Yiqisong, Jilin Province
CrystalsPeridot has a long history and is deeply loved by people for its unique olive-green color. The Yiqisong peridot deposit in Jilin Province is a newly discovered peridot deposit that still deserves systematic research.
Jina Li, Yi Zhao, Bo Xu
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Variation in Gemological Characteristics in Tsavorites with Different Tones from East Africa
Crystals, 2022 In this paper, the influencing factors of the color and the gemological changes of tsavorites with different tones from East Africa were studied. The gemological characteristics of 35 different green tones in tsavorites were collected based on the ...
Yuanmeng Ma, Ying Guo
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CrystalsGrossular, a widely recognized colored gemstone in the market, attains premium quality when exhibiting pale-toned orange-yellow to golden-yellow hues with high transparency.
Liu-Run-Xuan Chen +9 more
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Relationship between the Coloration Mechanism and Gemological Properties of Purple Scapolite
Crystals, 2023 Purple scapolite is a precious gemstone. In this paper, we compared the crystal structure and spectral characteristics of purple scapolite before and after heat treatment with conventional gemological tests, EPMA, XRF, LA-ICP-MS, infrared spectroscopy ...
Yinghua Rao +3 more
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Yankuang ceshi, 2023 BACKGROUND The emerald is loved by people because of its gorgeous color and is respected as one of the world's four major gems. Due to the high value of emeralds, a variety of synthesis and optimization methods have emerged.
ZHU Hongwei +8 more
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