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Identification of Melee-Size Synthetic Yellow Diamonds in Jewelry
Gems & Gemology, Fall 2008, Vol.44, No.3
Hiroshi Kitawaki, Ahmadjan Abduriyim and Makoto Okano |
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Identification of taaffeite and musgravite using a non-destructive
single-crystal X-ray diffraction technique with an EDXRF instrument
The Journal of Gemmology, 2008, Vol.31, No.1/2
Ahmadjan Abduriyim, Taisuke Kobayashi and Chihiro Fukuda |
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Research Lab. Report
New Geological Origin: Ruby from Winza of Tanzania 08.08.07 |
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Research Lab. Report
Natural Zincite 08.07.11 |
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Research Lab. Report
Rutilated Quartz Filled with Transparent Material (Oil / Resin) 08.06.20 |
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Research Lab. Report
Cu-Bearing Synthetic Beryl in “Paraíba Colour” 08.06.20 |
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Research Lab. Report
Synthetic opal called “MexiFire” and “PeruBlu” 08.05.29 |
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Research Lab. Report
BLUE ARAGONITE 08.01.29 |
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Lab. Alert (Laboratory of the month)
Treatment in Blue Sapphire [Up To Date]
"Super Diffusion Tanusorn"filling treatment with cobalt-coloured lead glass 07.12.27 |
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Research Lab. Report
Natural Johachidolite 07.11.30 |
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Notice of new office location:
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Research Lab. Report
Identification of heated / unheated status on ruby and sapphire 07.02.13 |
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Research Lab. Report
Detection of filling material in fissure and fracture of emerald 07.01.11 |
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Research Lab. Report
New Coating Treatment on Diamond 07.01.06 |
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A report from lectures at “Gemmological Society of Japan" 2006
TAAFFEITE and MUSGRAVITE<GEMSTONES IN THE LATEST TOPICS> 06.10.13 |
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A report from lectures at “Gemmological Society of Japan" 2006
EXPERIMENT OF HPHT TREATMENT ON DIAMOND<GEMSTONES IN THE LATEST TOPICS> 05.12.23 |
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APPLICATIONS OF LASER ABLATION-INDUCTIVELY COUPLED PLASMA-MASS SPECTROMETRY (LA-ICP-MS) TO GEMOLOGY
Gems & Gemology, Summer 2006, Vol.42, No.1
Ahmadjan Abduriyim and Hiroshi Kitawaki |
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Determination of the origin of blue sapphire using Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS)
The Journal of Gemmology, 2006, Vol.30, 1/2
Ahmadjan Abduriyim and Hiroshi Kitawaki |
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"PARAÍBA"-TYPE COPPER-BEARING TOURMALINE FROM BRAZIL, NIGERIA, AND MOZAMBIQUE:CHEMICAL FINGERPRINTING BY LA-ICP-MS
Gems & Gemology, Spring 2006, Vol.42, No.2
Ahmadjan Abduriyim, Hiroshi Kitawaki, Masashi Furuya and Dietmar Schwarz |
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Research Lab. Report
Up-to-date Be-diffused Blue Sapphire 06.06.27 |
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Research Lab. Report
Green Quartz 06.05.12 |
