Results 11 to 20 of about 399 (207)

Identification of Jadeite Filled with Inorganic Materials Using UV Fluorescence, Infrared Spectroscopy and LIBS Techniques

open access: yesYankuang ceshi, 2022
BACKGROUND Through visiting the jadeite market, the existence of inorganic material-filled jadeite is known, but there is a lack of identification basis due to rare references.
YANG Chunmei   +5 more
doaj   +1 more source

Problems Faced by Online Gemstone Traders of NamakMandi market at Pakistani Airports

open access: yesJournal of Business and Social Review in Emerging Economies, 2023
Purpose: This paper analyses the views and experiences of gemstone traders at the NamakMandi (NM) gemstone market. Methodology: The paper draws on the data from a stakeholder’s workshop held at Bacha Khan University Charsadda (Pakistan) and ten (10 ...
Syed Owais   +2 more
doaj   +1 more source

The Spectral Characteristics and Identification Techniques for Colorless and Near-colorless HPHT Synthetic Diamonds

open access: yesYankuang ceshi, 2016
Melee-sized colorless HPHT synthetic diamonds mixed with natural diamonds in jewellery have been reported by gem testing laboratory. It was noted that the differences of the fluorescence and phosphorescence between natural and synthetic diamonds are the ...
SONG Zhong-hua   +7 more
doaj   +1 more source

Identification of HPHT-treated Hydrogen-rich Diamonds by Optical Absorption and Photo Luminescence Spectroscopy Techniques

open access: yesYankuang ceshi, 2018
Research on different types of brown diamonds under high temperature and high pressure and their structural characteristics is one of the most difficult and important issues in diamond research. Previous studies on hydrogen-rich diamond mainly focused on
SONG Zhong-hua   +7 more
doaj   +1 more source

Gemstone Inclusion Study by 3D Raman-Mapping and High-Resolution X-ray Computed Tomography: The Case of Trapiche Emerald from Swat, Pakistan

open access: yesCrystals, 2022
Gemstones usually contain inclusions as the natural hallmark of their formation. Studies on inclusions may contribute to our understanding of the gem and better adapt to the gems and jewelry industry.
Yujie Gao   +5 more
doaj   +1 more source

Research on Laboratory Testing Features of Chemical Vapor Deposition in Overgrowth Diamonds

open access: yesYankuang ceshi, 2019
BACKGROUND Overgrowth diamond refers to the product of thick CVD synthetic diamond layer grown on a natural diamond with the whole appearance. Since overgrown diamonds contain information on the nitrogen impurities of natural diamonds, traditional ...
TANG Shi   +12 more
doaj   +1 more source

O reprezentare a lui Marsyas pe o gemă de la Romula

open access: yesArheologia Moldovei, 2022
This small article is focused on the representation of Marsyas, on a gemstone from Romula. The piece is unpublished and the representation of Marsyas like a young boy is quite unusual. It is the only known representation of Marsyas in the gliptic of the
Gabriele Filip
doaj   +1 more source

A Case Study on Distribution of Gemstone in Bela Ophiolite, District Khuzdar, Balochistan

open access: yesInternational Journal of Economic and Environment Geology, 2022
Bela Ophiolite and suture zone host several types of gemstones in the underlain and overlain rocks such as garnet (demantoid and almandine), quartz, brucite, malachite, chrysocolla, azurite, calcite, natrolite, green chert, jasper, serpentine, agate ...
Salman Khan   +5 more
doaj   +1 more source

Placebo effect of gemstones

open access: yesJournal of Awareness, 2022
The placebo effect can be explained as a response other than the specific influence of a treatment which comes from the psychosocial forces surrounding the treatment. This effect can be observed all over the world when people use healing stones. In this study, the perception of healing stones was investigated using the questionnaire technique.
Yusuf Arif Kutlu   +2 more
openaire   +3 more sources

A research on traditional ring making art of Qom [PDF]

open access: yesDānishhā-yi būmī-i Īrān, 2017
Metalworking art is one of the native arts of Iran that traditional artists of this territory have been working on it in different types and usages since the ancient times.
amirhosein chitsazian, tahereh vafaee
doaj   +1 more source

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