Results 11 to 20 of about 2,925,624 (251)
Mineralogy Characteristics and Coloration Mechanism of Green Tourmaline in Tanzania
Yankuang ceshi, 2022 BACKGROUND There are differences in the production characteristics, chemical composition, coloration mechanism and formation conditions of green tourmaline from different producing areas.
TAO Longfeng +3 more
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Disruptive coloration and habitat use by seahorses [PDF]
Neotropical Ichthyology, 2019 Predation avoidance is a primary factor influencing survival. Therefore, any trait that affects the risk of predation, such as camouflage, is expected to be under selection pressure.
Michele Duarte +3 more
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Applied Sciences, 2021 The blue coloration model of a closed pond, Ao-ike Pond, Aomori Prefecture, Japan, was formulated in terms of radiance by applying a theory of observation devices proposed by Szirmay-Kalos (2008) and Hanaishi’s reverse ray tracing method.
Ryuji Hanaishi, Kazuhisa A. Chikita
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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
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Intrinsic climatic predictability affects ornamental coloration of adult males: Evidence for compensation among carotenoid‐ and melanin‐based coloration [PDF]
, 2022 © 2022 The Authors. Functional Ecology published by John Wiley & Sons Ltd on behalf of British Ecological Society. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and ...
Diego Vicente‐Sastre +6 more
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Crystals, 2023 Fluorite has been attracting the attention of gemstone mineralogists because of its rich color and excellent fluorescence properties. This paper studied fluorite with three color types (blue, green, and white) and five blue-purple fluorites with an ...
Yang Liu +5 more
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Mineralogical Characteristics and Coloration Mechanism of Yellow-Green Alunite Jade
Yankuang ceshi, 2020 BACKGROUND As a new kind of jade, yellow-green alunite jade is difficult to positively identify and evaluate due to the lack of research. Yellow-green alunite jade is a new type of jade that has appeared on the market in recent years.
SONG Yan-jun +5 more
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Effect of Reduction Annealing on the Coloration Mechanism of Yellow Sapphire with High Iron Content
Crystals, 2022 The color of yellow sapphire from Africa characterized by high iron content and low levels of other transition metal elements was changed from yellow to grayish-blue after high-temperature reduction annealing.
Xiao Wu +4 more
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Ionizing radiation and melanism in Chornobyl tree frogs
Evolutionary Applications, 2022 Human actions are altering ecosystems worldwide. Among human‐released pollutants, ionizing radiation arises as a rare but potentially devastating threat to natural systems.
Pablo Burraco, Germán Orizaola
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New Insights into Coloration Mechanism in Violet-Red Pyrope-Almandine
Crystals, 2022 The most common type of garnet is pyrope-almandine, whose color varies from red to violet. In this study, 36 faceted gem-quality samples are used for electron microprobe, infrared spectrum, and UV-Visible spectrum test to find the coloration mechanism ...
Puyue Yang, Ying Guo
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