Results 71 to 80 of about 1,971 (197)

Gemstones And Kartal Amethyst Formations

, 1996
Tez (Yüksek Lisans) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 1996Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 1996These man-made gemstones are not "imitations" or "fakes" but ...
Gözüpek, Banu
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Several bits of semi-gemstones.

, 1919
Close-up of seven specimens of different gemstones cut into various shapes.

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Calc-silicate gemstones from the meluco region, Cabo Delgado, Mozambique

Northeastern Mozambique, regional Proterozoic formations in the Meluco region, especially its metacarbonate members, host Mg-B-rich skarns bearing coloured dravite and other BMg-calc-silicate gemstones, in Micute and N’Djekwa area.
Gomes, C. Leal
core   +1 more source

Color Mechanism of Blue Myanmar Jadeite Jade: The Role of Trace Elements and Mineralogical Characteristics

Crystals
Myanmar blue jadeite jade is a rare and highly prized gemstone, yet its coloration and formative mechanisms remain poorly understood. In this study, petrographic analysis, ultraviolet–visible (UV–Vis) spectroscopy, electron probe microanalysis (EPMA ...
Shangzhan Dai, Yu Zhang, Guanghai Shi, Taafee Long   +3 more
doaj   +1 more source

Preparation and Basic Properties of Praseodymium-Neodymium-Chromium Containing Imitation Gemstone Glass. [PDF]

Materials (Basel), 2022
Zhang S, Li K, Pu J, Ni W.
europepmc   +1 more source

Conference Proceedings: Gemstones in the first Millennium

, 2017
Researchers from different fields like archaeology, history, philology and natural sciences present their studies on ancient gemstones. Using precious minerals as an example, trade flows and craftsmanship, but also utilisation and perception are ...
zellwerk
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Jewellery Production of the Leningrad Plant of the Russian Gemstones Trust (1946–1957): Models and Technologies

Известия Уральского федерального университета. Серия 2: Гуманитарные науки
Modern researchers are rethinking and revising the works of Soviet industrial art. The article is devoted to the activities of Leningrad Gemstone Processing Plant No. 2 of the Russian Gemstones Trust.
Natalia Valerievna Borovkova
doaj   +1 more source

The Gemstones of Roman Bath: Exploring the Global and Glocal Affordances of the Materials and Images of the Gemstones from Aquae Sulis

80 pagesAquae Sulis, a Roman settlement in modern Bath, England, was home to a temple and bath complex beginning in the late first century CE. In 1895, thirty-three Roman gemstone intaglios and one glass intaglio were identified in the complex’s drainage
Joyce, Maggie
core   +1 more source

Necklace of metal and gemstones.

Necklace of metal and ...
Unknown
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Carat, clarity, colour, and cut: grading the DIAMOND trial. [PDF]

Eur Heart J, 2023
Butler J, Budden J, Pitt B, Anker S.
europepmc   +1 more source