Results 1 to 10 of about 354 (163)
Study on Gemological Characteristics and Inclusions of Yellow Topaz
Crystals, 2022 Topaz is a kind of mineral with variable composition and a common gemstone variety. Because of its wide distribution and rich colors, it has attracted the attention of scholars around the world.
Zixiong Song, Qingfeng Guo, Libing Liao
doaj +5 more sources
Gemological and Mineralogical Characteristics of Emerald from Ethiopia
Crystals, 2023 Ethiopia has been gaining attention in recent years as an emerging source of high-quality emerald. Ethiopian emerald samples with different colors ranging from dark green to light green were selected to study the gemological properties, chemical ...
Zixuan Huang +3 more
doaj +5 more sources
Gemological and Spectral Characteristics of Gem-Quality Blue Gahnite from Nigeria
Journal of Spectroscopy, 2023 Gem-quality blue octahedral crystalline gahnite was produced in Nigeria. This paper investigated gemological and spectroscopic characteristics by basic gemological experiments, electron probes, infrared reflectance spectroscopy, laser Raman spectroscopy,
Yifang Chen +4 more
doaj +4 more sources
Gemological Characteristics of Blue-Violet Cordierite
CrystalsCordierite is a violet-blue gem mineral primarily composed of magnesium aluminum silicate. This study employed three samples of Mg-cordierite and conducted tests on their gemological characteristics, spectroscopic features, and chemical composition using
Wenjie Yan +3 more
doaj +5 more sources
Crystals, 2022 Currently, most of the popular spinels in the jewellery market come from Myanmar and Tajikistan. It is well known that provenance is one of the main factors affecting the value of a gemstone, and the geographic origin of a gemstone can be determined by ...
Yi Zhang, Jing-Ran Zhu, Xiao-Yan Yu
doaj +5 more sources
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
doaj +4 more sources
Gemological and Luminescence Characteristics of Taaffeites from Mogok, Myanmar
Minerals (Basel, Switzerland), 2023 Taaffeite is a rare gem that has been found in different localities such as Tanzania, Sri Lanka, China, and Mogok, Myanmar. In this study, thirty-two taaffeite samples from Mogok, Myanmar, were investigated by conventional gemological testing, laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), Raman spectrometry, and fluorescence ...
Xiaojing Lai, Qian Zhang
exaly +3 more sources
Mineralogical And Gemological Characteristics Of Metaophiolite Hosted Corundum (Malatya-Türkiye)
Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2021 The corundum is found in the rocks of the Berit metaophiolite in Eastern Anatolia, near Doğanşehir a province of Malatya. Metaophiolitic rocks consist mainly of garnet metagabbro, granulite, amphibolite, mylonitic amphibolite, garnet amphibolite ...
Fikret İşler +5 more
doaj +6 more sources
Jewelry Morocco septaria. Gemological characteristics and mineral composition
Известия высших учебных заведений: Геология и разведка, 2023 Background. Septaria, comprising calcareous-clay nodules with calcite veins, are widely used as jewelry and ornamental materials. Septaria from Morocco represented on the world and Russian markets of jewelry and ornamental stones remain gemologically and
D. A. Petrochenkov
doaj +2 more sources
Gemological Characteristic Difference between Colorless CVD Synthetic Diamonds and Natural Diamonds. [PDF]
Materials (Basel), 2021 CVD synthetic diamond plays an important role in the jewelry market due to its excellent performance and low cost. In this paper, colorless CVD synthetic diamonds produced by a Chinese company were investigated in detail with their gemological, spectroscopic, and luminescent properties compared with natural colorless diamonds.
Lu Q, Gong H, Guo Q, Huang X, Cai J.
europepmc +4 more sources