Results 21 to 30 of about 3,574 (241)
Yankuang 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
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Yankuang 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
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Crystals, 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
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Research on Laboratory Testing Features of Chemical Vapor Deposition in Overgrowth Diamonds
Yankuang 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
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O reprezentare a lui Marsyas pe o gemă de la Romula
Arheologia 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 The piece is unpublished and the representation of Marsyas like a young boy is quite unusual.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
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NFT Certificates and Proof of Delivery for Fine Jewelry and Gemstones
IEEE Access, 2022 Fine jewelry is a unique class of ornaments composed of precious metals and gemstones. Premium-grade metals such as gold, platinum, and sliver, and gemstones such as pearls, diamonds, rubies, and emeralds are used use to make fine jewelry.
Noura Alnuaimi +5 more
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Yankuang ceshi, 2019 BACKGROUND There are water molecules and hydrous mineral inclusions in natural ruby and sapphire. The hydrous minerals disappear easily after heat treatment, which causes the physical and chemical properties of ruby and sapphire to change.
NING Pei-ying +6 more
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A research on traditional ring making art of Qom [PDF]
Dānishhā-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
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A Case Study on Distribution of Gemstone in Bela Ophiolite, District Khuzdar, Balochistan
International 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
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, 2020 การวิจัยครั้งนี้ใช้วิธีการวิจัยแบบบูรณาการวิจัยเชิงปริมาณและการวิจัยเชิงคุณภาพ โดยมีวัตถุประสงค์ของการวิจัยได้แก่ 1) เพื่อศึกษาระดับความสำคัญศักยภาพของผู้ประกอบการในอุตสาหกรรมพลอย และ 2) เพื่อสร้างรูปแบบศักยภาพของผู้ประกอบการในอุตสาหกรรมพลอย ประชากรกล ...
Pinthapataya, Jutharat +1 more
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