gemology

(redirected from gemmological)
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Related to gemmological: gemology

gemology

[je′mäl·ə·jē]
(mineralogy)
The science concerned with the identification, grading, evaluation, fashioning, and other aspects of gemstones.
References in periodicals archive ?
At the same time, we expect our new trainees to study, sit for, and pass external examinations in gemmology before specialising further in a gemmological discipline,' he added.
She termed the agreement a milestone for the development of gemmological sector and said that it would also invite women entrepreneurs to be a part of gems export industry which if further developed would become a source of earning foreign exchange.
The best semi-official reassurance comes from independent gemological associations such as the Gemmological Association (GA) in the UK and the Gemological Institute of America (GIA).
One gemmological expert said he thought it would be worth more as a geological curio than a gemstone.
The diamonds will be sealed and carry certifications from premium grading institutes such as the Gemmological Institute of America, HRD Antwerp and the International Gemmological Institute.
International Diamond Laboratories (IDL), an initiative of the DMCC, also signed a separate MoU with GAC for the possible establishment of a joint functional gemmological service centre in the People's Republic of China.
Fred served as gem expert for Jewelers' Circular-Keystone, contributing editor for Lapidary Journal (since 1945), and a consultant for the Gemmological Association of Japan.
To assist visitors with making informed buying choices, the world's foremost authority on gemology the GIA (Gemmological Institute of America) will be offering visitors complimentary seminars on gems and jewellery.
Blauwet loaned five of the faceted stones (0.52-1.96 ct; Figure 3) to AGL for examination, and the following gemmological properties were recorded: colour--brownish yellow to yellow, except for one sample that was orangey yellow; no obvious pleochroism; RI--1.592-1.623; birefringence--0.028-0.029; SG--3.12-3.20; fluorescence--inert to long-wave UV and weak-to-moderate yellow to short-wave UV radiation; and no features were visible with the desk-model spectroscope.
Hamid Usman Khattak, Gemmologist from Gems and Gemmological Institute of Pakistan (GGIP) delivered a detailed lecture on gemstone deposits of Pakistan and identification of gemstones.
The workshop titled "Gemstone Grading, Treatment and Evaluation" was organized by PMNH (a subsidiary of Pakistan Science Foundation), International Gemmological Laboratory, Gems and Gemmological Institute of Pakistan (GGIP), Pakistan Association of Petroleum Geologists and Islamabad Women Chamber of Commerce and Industry.
The course was conducted by the director of the diamond department at the Swiss Gemmological Institute (SSEF) in Basel, Jean-Pierre Chalain.