Results 31 to 40 of about 1,047 (213)
, 2021 In recent years, a new type of material called Philippines “Dushan jade” has appeared in the gemstone market in China. This new type of material, very similar in appearance and physical properties to Dushan jade, an important ancient jade with a long ...
Xiaomeng Ye +3 more
semanticscholar +1 more source
Crystals, 2023 Agate attracts the attention of gem mineralogists because of its variable colors. The color of agate is closely related to its naming and classification, so it is necessary to study the color and mineral origin of agate.
Sixue Zhang +6 more
doaj +1 more source
Gemology from science to art: An exposition as an extensionist action, promoting new pedagogical practices in the gemology course [PDF]
, 2019 Em busca de novas práticas pedagógicas e quebrando paradigmas, frente aos desafios do mundo acadêmico surgiu uma oportunidade para que alunos do curso de Gemologia da UFES, pioneiro e único no Brasil, pudessem trazer ao grande público uma abordagem com o
Bomfim, Shelley +2 more
core +1 more source
Variation in Gemological Characteristics in Tsavorites with Different Tones from East Africa
Crystals, 2022 In this paper, the influencing factors of the color and the gemological changes of tsavorites with different tones from East Africa were studied. The gemological characteristics of 35 different green tones in tsavorites were collected based on the ...
Yuanmeng Ma, Ying Guo
doaj +1 more source
Gemological features of diaspore in sodra—Milas (mugla) region
Frontiers in Earth Science, 2023 Diaspore, is related to bauxite in terms of its formation mechanism. Diaspore is one of the gemstone quality stones used in jewelry and jewelry making. It is possible to come across gemstones in various regions of the world.
Eyyüp Hikmet Kinaci, Alican Ozturk
doaj +1 more source
Gem andradite garnet deposits demantoild variety
, 2017 The objective of this short review and update is to present the state-of-the-art on the geology and gemology of demantoid garnet deposits. The different studies conducted over the last thirty years provide the opportunity to unravel the features of the
Razafindratsimba, Sitraka +6 more
core +7 more sources
Low-Crystallinity Index Chalcedony from Longhua, China: Characteristics and Formation [PDF]
Lithosphere, 2023 A low-crystallinity index chalcedony was found in the rhyolitic ignimbrite of the Late Jurassic Zhangjiakou Formation, located in Longhua County, Hebei Province, China.
Qiuli Yan, Guanghai Shi
doaj +1 more source
Spectroscopic Characteristics and Coloring Mechanisms of Different Colored Spinels from Myanmar
Crystals, 2023 Spinel is a common gemstone that has attracted the attention of gemologists worldwide because of its high refractive index, rich colors and brilliant hues. Myanmar is an important source of spinel. The present paper provides a systematic characterization
Lei Zhang, Kui He, Qingfeng Guo
doaj +1 more source
Crystals, 2022 With the development of synthetic gem technology, a large number of synthetic rock crystals, such as natural and synthetic amethyst and natural and synthetic smoky quartz, have emerged in the market.
Kaichao Liu, Ying Guo
doaj +1 more source
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 +1 more source