Results 81 to 90 of about 163 (100)
Yeşil opalin gemolojik özellikleri = Gemological characteristics of green opal [PDF]
, 2017 Bu çalışmada; İnceleme alanı, Türkiye’nin doğusunda bulunan Doğu Anadolu Bölgesi’nde Kırdağ’daki, Şenkaya (Erzurum) ilçesinin batı-kuzeybatısında yer alır. Türkiye’de ve Dünya’da gerçekten nadir rastlanan yeşil opal, koyu ve açık tonlarda elma veya fıstık yeşili renginde bir mineraloiddir.
openaire
Gemological Characteristics and Coloration Mechanism of Vanadium-Bearing Beryl from Nigeria
MineralsVanadium-bearing beryl is a vanadium-bearing variety of green beryl (distinct from emerald) that exhibits an “electro-optical” green (blue-green) color, which has led to its commercial popularity. However, the underlying coloration mechanism remains unclear.
Yunlong Hong +4 more
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Gemological and Chemical Characterization of Gem-Quality Titanite from Morocco
CrystalsTitanite is a widespread accessory mineral in igneous, metamorphic, and hydrothermal rocks, but few comply with gem-grade requirements. Previous studies on Moroccan titanite focused on elementary composition and U-Pb dating.
Yu Yuan +5 more
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CrystalsA new type of vesuvianite jade has recently been discovered in Hanzhong City, Shaanxi Province, China. However, a systematic investigation into its mineralogical characteristics and the origin of its color is currently lacking.
Ye Yuan +4 more
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The Gemological Characteristics of Pipi Pearls Reportedly from Pinctada Maculata [PDF]
Gems & Gemology, 2019 Nanthaporn Nilpetploy +2 more
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Gemological Characteristics of Saltwater Cultured Pearls Produced After Xenotransplantation
Gems & Gemology, 2013 Stefanos Karampelas, Aurore Lombard
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Cultured Pearls from Lake Kasumigaura: Production and Gemological Characteristics
Gems & Gemology, 2018 openaire +1 more source
Dagestan State Pedagogical University. Journal. Natural and Exact Sciences, 2018 openaire +1 more source
Vestnik of Institute of Geology of Komi Science Center of Ural Branch RAS, 2019 openaire +1 more source
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Study on the Gemological Characteristics of Amber from Myanmar and Chinese Fushun
Key Engineering Materials, 2013This paper researches on the gemological characteristics of amber from Myanmar and Chinese Fushun by using of the basic instruments of gemology, SEM and FT-IR. The results show that the refractive index is approximately 1.54 both in Myanmar and Fushun amber, resin glossy as well as conchoidal fracture. While the hardness of Myanmar amber is much higher
Qiu Yu Xing +3 more
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