Results 21 to 30 of about 4,649 (283)
Crystal structure of Cr-bearing Mg3BeAl8O16, a new polytype of magnesiotaaffeite-2N′2S
Acta Crystallographica Section E: Crystallographic Communications, 2016 The crystal structure of a new polytype of magnesiotaaffeite-2N′2S, ideally Mg3BeAl8O16 (trimagnesium beryllium octaaluminium hexadecaoxide), is described in space-group symmetry P-3m1. It has been identified in a fragment of a mineral sample from Burma (
Thomas Malcherek, Jochen Schlüter
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A Review of Analytical Methods Used in Geographic Origin Determination of Gemstones
Gems & Gemology, 2019 GEMS & GEMOLOGY WINTER 2019 In gemology, “origin” refers to the geographic locality of a gemstone deposit (Hänni, 1994). Origin determination of colored gemstones began with Gübelin and SSEF (both in Switzerland) in the 1950s and with AGL (New York) in ...
L. Groat +5 more
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, 2020 Geuda is a variety of corundum gems commonly found in Sri Lanka and Madagascar. Geuda lack colour and clarity compared to other sapphires yet has the potential to convert into quality blue sapphires by heat treatment at high temperatures.
R. Jaliya, P. Dharmaratne, K. Wijesekara
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Gemstones of eastern Kazakhstan
, 2020 An overview is presented of gemstones from eastern Kazakhstan in terms of their geographical distribution, geological provenance and genesis, gemmological characteristics, historical use and current applications. Locally occurring precious, semi-precious
J. Chlachula
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Non-Invasive Analyses of Italian “Ostrogothic” Jewellery: The Desana Treasure
Heritage, 2023 The Desana treasure is a remarkable assemblage of items made of gold, silver, gemstones and glasses found in north-western Italy. Most scholars agree on the fact that the core of the treasure might have belonged to a single deposit resulted from a long ...
Maurizio Aceto +7 more
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QR code micro-certified gemstones: femtosecond writing and Raman characterization in Diamond, Ruby and Sapphire. [PDF]
Sci Rep, 2019 This paper reports on a micro-certification procedure using femtosecond laser irradiation to microscopically mark a single-crystalline gemological and natural diamond, synthetic ruby and synthetic sapphire, inscribing a QR Code on them.
Batista AJ +4 more
europepmc +2 more sources
Ennen ja Nyt: Historian TietosanomatArtikkeli tutkii synteettisiä jalokiviä tukkumainonnan kautta ja kysyy, millaisia merkityksiä ne saivat mainoksissa, joita julkaistiin Kultaseppien lehdessä vuosina 1926–1959.
Mia Haittoniemi
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A NEW INVESTIGATION OF VIETNAM’S BERYL
ASEAN Journal on Science and Technology for Development, 2017 The paper presents briefly new investigation of Vietnam beryl group, especially some characteristics of regional geology of Song Chay granite massif and new find of big crystals of beryl in them.
Nguyen Van Binh, Nguyen Thi Hong
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Yankuang ceshi, 2014 Surface tension is one of the important physical and chemical parameters of the solid surface, which is closely related to temperature and properties of the phases between the boundaries.
BAO Xue +6 more
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Jurnal Ilmu Agama: Mengkaji Doktrin, Pemikiran, dan Fenomena Agama, 2016 This research aims to analyse the meaning of gemstones and their impact to the society. Thiis research uses qualitative approaceh with Miles and Huberman (1992) point of view on the meaning of symbols.
Middya Boty
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