Results 41 to 50 of about 163 (100)
Journal of Raman Spectroscopy, Volume 52, Issue 1, Page 71-77, January 2021., 2021 Abstract Raman spectroscopy is a convenient, efficient, and non‐destructive technique that could estimate the metamictization degree of zircon, particularly for gem‐class or historical samples. The full width at half maximum value of the ν3(SiO4) band around 1000 cm−1 can classify the structural state of zircon as crystallized (the full width at half ...
Shijia Gao, Gerhard Heide
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Location characteristics of tremolite jade from Dahua, Guangxi
地质科技通报, 2021 The tremolite jade found in Dahua County, Guangxi Province, is a new type of tremolite jade that has only appeared in the past two years with a low degree of research. But the jade in this production area occupies a large share in the market.
Zuowei Yin, Wenwei Wang, Qingchao Zhou
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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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Crystals, 2022 “Laoshan Jade” is located in the Yangkou area of the Sulu UHP metamorphic belt. This is the first time a systematic research study is performed on its conventional gemological characteristics, mineral compositions, geochemical characteristics, and ...
Xiaomin Yu, Yingxin Liu, Chuqi Cao
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Mineral Composition and Genesis of Black Quartzite Jade from Linwu County, Hunan Province
Yankuang ceshi, 2021 BACKGROUND Black quartzite jade is a type of commonly and commercially available jade. Many areas produce this gem. OBJECTIVES To analyze the gemological characteristics and mineral composition of the jade samples and to discuss their genesis.
MIAO Xu, SHI Miao, WANG Li-sheng
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Gemological and Trace Element Characteristics of Cassiterite from Yunling, China
Gems & GemologyWenqing Huang +7 more
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Frontiers in Earth Science, 2023 The nephrite jade deposits of different tectonic units in China exert significant commercial quality, which have attracted wide attention. However, these deposits have not been systematically summarized to date.
Cun Zhang +6 more
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CrystalsSpodumene is a characteristic mineral in lithium-rich granitic pegmatites, serving both as a valuable mineral resource and an important gem material. This study incorporates three different color varieties of spodumene—pink to violet, yellow-green, and ...
Zijia Zhou +4 more
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The Chemical Composition of Trapiche-like Quartz from Huanggangliang Area, Inner Mongolia, China
Crystals, 2022 Trapiche-like quartz, which is found in Huanggangliang area, Chifeng City, Inner Mongolia, China, has a short columnar euhedral shape. Arms of trapiche-like phenomena are formed by six radial dark bands located along the a-axis of crystals, and their ...
Ling Jiang, Zhu Chen, Yingxin Liu
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Geostandards and Geoanalytical Research, Volume 50, Issue 3, Page 677-700, September 2026.Key Points Low‐Mg calcite RM developed for in situ microanalysis applications in palaeoclimatology (δ18O, δ13C; Mg, Sr m/m). New data for calcite CRM IAEA‐603 (δ18O, δ13C by SIMS and GS‐IRMS; Mg m/m). No detectable IMF effect of Mg on SIMS δ18O determinations for mass fractions < 3650 μg g‐1.
Andreas T. Hertwig +13 more
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