Results 71 to 80 of about 354 (163)
Journal of Raman Spectroscopy, Volume 55, Issue 2, Page 200-215, February 2024.A collection of Hellenistic–Roman glyptics was investigated in situ at the Regional Archaeological Museum “Paolo Orsi” (Syracuse, Italy), with portable Raman spectroscopy. 85% of the samples was successfully identified, the attribution was corrected for 4% of the gemstones, among which a gold ring with garnet, previously mistaken for carnelian.
Maria Cristina Caggiani +5 more
wiley +1 more source
CrystalsThe Sar-e-Sang lapis lazuli deposit has a mining history exceeding 5000 years, producing the world’s finest lapis lazuli. Recently, gem-quality forsterite has been discovered in the marble containing spinel, dolomite, and phlogopite at the periphery of ...
Dai Zhang +11 more
doaj +1 more source
Study on the Microstructure and Spectra of Regrown Quartz Crystals from Chinese Jewelry Market
Crystals, 2021 Regrown quartz crystals consist of the natural section and the synthetic section grown by hydrothermal technique, which has become popular on the Chinese jewelry market in recent years.
Danyi Zhou +6 more
doaj +1 more source
Gemological study of emeralds from the Crown of Napoleon III at Paris School of Mines
, 2022 International audienceAs most of the French Crown Jewels, the Coronation Crown of Napoleon III was dismantled in 1887 prior to the large auction intended to get rid of the foremost symbol of Royalty and Empire.
Gaillou, Eloise +9 more
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Yankuang ceshi, 2016 Due to the nondestructive requirements of gem testing, evaluation of precious stones shows characteristics of science and uncertainty. Gemological application of X-ray Diffraction (XRD) is specialized, with its application mainly concentrated in three ...
ZHANG Ni, LIN Chun-ming
doaj +1 more source
Spectral Characteristics of Unique Species of Burmese Amber
, 2023 Special species of Burmese amber are highly valued within the gemological market due to their fancy optical characteristics. However, some ordinary amber species are misidentified as precious species, which has disrupted consumers’ purchasing ...
Chenxing Xin, Zhaotong Shi, Yamei Wang
core +1 more source
Gemological Characteristics of Aquamarine from the Gilgit-Baltistan of Northern Areas, Pakistan
Journal of the mineralogical society of korea, 2015 We applied gemological analytical approaches on Aquamarine from the Gilgit-Baltistan of Northern Areas, Pakistan. The standard gemological testing indicates that they are consistent with general characteristics of natural aquamarines. We have identified the inclusions of Tantalite-Mn by Raman analysis.
Sung Jae Kim +3 more
openaire +1 more source
, 2020 The Zhanguohong agate from Beipiao (Liaoning province, China), which occurs in the intermediate–felsic volcanic breccias of the Early Cretaceous Yixian Formation, generally shows massive and banded structures, with red, yellow, and/or white layers or ...
Lei Ji, Xuemei He, Xuemei Zhang
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"Hopovo" gemstone occurrence (Fruška gora) [PDF]
Tehnika, 2020 This study presents geological, mineralogical, and gemological characteristics of gemstone deposit (silica and carbonate minerals) that occur in Mesozoic Fruška gora ultramafites in the vicinity of Hopovo Monastery.
Miladinović Zoran Ž.
doaj
, 2023 Dissertação de Mestrado em Geociências apresentada à Faculdade de Ciências e TecnologiaO corindo é um mineral muito procurado em todo o mundo pelas suas características. Os exemplares naturais deste mineral são raros e muito valorizados. Nos últimos anos,
Sousa, António Maria Lopes Soares de
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