Results 51 to 60 of about 354 (163)
Crystals, 2023 Green diopside is currently popular in the jewelry market due to its attractive color and excellent transparency. Gem-quality diopsides are mainly sourced from Pakistan, Italy, Russia, and other places.
Zixuan Wang +3 more
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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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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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Silica gemstones formation in Yamadag volcanites (Arguvan-Malatya) mineralogical, geochemical, gemological properties and economic importance [PDF]
, 2018 WOS: 000427552600018Yamadag Volcanics which is one of the examples of the Late Miocene volcanism in Eastern Anatolia covers large areas within the boundaries of Arguvan county of Malatya.
Akbudak, Ilkay Kaydu +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, EarlyView.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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Visible and Near‐Infrared Reflectance Spectroscopy for Investigating Soil Mineralogy: A Review
Journal of Spectroscopy, Volume 2018, Issue 1, 2018., 2018 Clay minerals are the most reactive and important inorganic components in soils, but soil mineralogy classifies as a minor topic in soil sciences. Revisiting soil mineralogy has been gradually required. Clay minerals in soils are more complex and less well crystallized than those in sedimentary rocks, and thus, they display more complicated X‐ray ...
Qian Fang +6 more
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European Journal of Inorganic Chemistry, Volume 29, Issue 13, 1 May 2026.Comprehensive quantitative analysis of the relationship between NiO concentration and CIE1976 color parameters in Ni‐beryl crystals. Rough beryl contains various transition metal species owing to its geological formation conditions, and their concentrations largely determine the resulting crystal's color—a key physical property that strongly influences
Yusei Sonobe +15 more
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