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Emerald is a gemstone and a variety of the mineral beryl (Be3Al2(SiO3)6) colored green by trace amounts of chromium or sometimes vanadium. Beryl has a hardness of 7.5–8 on the Mohs scale. Most emeralds have much material trapped inside during the gem's formation, so their toughness (resistance to breakage) is classified as generally poor. Emerald is a cyclosilicate.
Gemology or gemmology is the science dealing with natural and artificial gemstone materials. It is a geoscience and a branch of mineralogy. Some jewelers are academically trained gemologists and are qualified to identify and evaluate gems.
Cambridge Information Group (CIG) is a privately held global investment firm focusing on information services, education and technology. It began as a firm providing services to academic publishers. It is headquartered in Bethesda, Maryland.
The Canadian Institute in Greece (CIG) is one of the 19 foreign archaeological institutes operating in Athens, Greece.
The Ministry of Culture and Islamic Guidance is the Ministry of Culture of the Islamic Republic of Iran. It is responsible for managing access to media that, in the view of the Iranian government or the ministry, violates Iranian ethics or promotes values alien to Iranian culture. This may include internet censorship. It also manages the alignment of religion and the law of the country. It was formed by combining the Ministry of Culture and Art, and the Ministry of Information and Tourism. The merging of Ministries reduces the number of employment positions as the number of employable ministries also lessens.
Gemmological Institute of India is a gemmology training school in Mumbai, India.
The Canadian Institute of Geomatics is a not-for-profit scientific association based in Ottawa, Ontario devoted to the development of geomatics in Canada. It was previously known as "Canadian Institute of Surveying and Mapping" and the "Association canadienne des sciences géodésiques et cartographiques".
The Swiss Gemmological Institute (SSEF) is a gemmology laboratory located in Basel, Switzerland. It is a part of the Schweizerische Stiftung für Edelstein Forschung. It was founded on an independent basis, by trade organisations, on August 22, 1972. George Bosshart, mineralogist and GG was the first director after the laboratory's opening in Zürich. Diamond grading was the major task and colour stones were tested rather exceptionally. In 1980 Bosshart hired Dr. Henry A. Hänni, Mineralogist and FGA. In 1994 Hänni moved the laboratory to Basel. He has been teaching gemmology at Basel university, and the close link to the university proved to be very enriching for both parts, academic and laboratory work. Hänni became professor of gemmology at Basel University, also a reward for his years of steady research and supply of publications. Prof. H.A. Hänni retired in 2009 and Dr. Michael Krzemnicki took over his position as a director. Dr. Krzemnicki has been working for SSEF since 1999.
Daggubati Purandeswari is an Indian politician from the state of Andhra Pradesh and the State President of the Bharatiya Janata Party, Andhra Pradesh since 2023. She had served as the Minister of State in the Ministry of Human Resource Development in 2009 and MoS in the Ministry of Commerce and Industry in 2012.
A copper indium gallium selenide solar cell is a thin-film solar cell used to convert sunlight into electric power. It is manufactured by depositing a thin layer of copper indium gallium selenide solid solution on glass or plastic backing, along with electrodes on the front and back to collect current. Because the material has a high absorption coefficient and strongly absorbs sunlight, a much thinner film is required than of other semiconductor materials.
Scripta Geologica is a peer-reviewed scientific journal that publishes on vertebrate and invertebrate palaeontology, palaeobotany/palynology, stratigraphy, petrology, and mineralogy, including gemmology with a focus on systematics. It is published by the Dutch National Museum of Natural History, Naturalis.
The Gemmological Association of Great Britain (Gem-A) is an international gemmology education and qualifications body based in the United Kingdom.
Richard T. Liddicoat, Jr. was an American gemologist. Liddicoat was an educator in gemology, who made contributions in the area of diamond quality grading and gem identification. Liddicoat was the Chairman of the Board of Governors at the Gemological Institute of America (GIA).
The Canadian Gemmological Association (CGA) is a Canada-wide professional organization which sets standards in the practice of gemology. It is a non-profit, educational organization, which provides a forum for Canadian gemmologists to meet and share experiences and knowledge about gemstones. The CGA acts as a liaison with governments in setting guidelines for the sale and marketing of diamonds, coloured stones and pearls, and helps to establish guidelines for gem and jewellery appraising in Canada.
The German Gemmological Association (DGemG) is a nonprofit, technical-scientific association in the field of gemmology, located in the European gemstone center Idar-Oberstein. The two most important points of the statutes are the promotion of gemmology as science and technique and the development of information and education in the field of gemmology.
The Indian Diamond Institute (IDI) is a Government of India sponsored autonomous higher school of learning in the fields of diamonds, gems and jewellery in India. The Institute is located in Surat, Gujarat, India and is 263 km away from Mumbai. Indian Diamond Institute is an Authorised Assayer of Department of Customs, Government of India.
The Galician Unions Confederacy is a trade union in that was created after the merge of two previous unions: the INTG and the CXTG. It has a Galician nationalist and socialist ideology and generally defends a combative labour model, as opposed to the perceived mild tactics of the other two main unions in Galicia, CCOO and the UGT. The union has organized 6 general strikes in Galicia since its creation.
Golden sheen sapphire, is a recently discovered variety of corundum. Goldsheen sapphire has been tested and confirmed in lab reports as "natural sapphire" by GIA, GIT, GRS, AIGS, Tokio gem labs and Lotus.
Jack Ogden, FSA, FGA, is a British jewellery historian with a particular interest in the development of Materials and technology. He is considered one of the foremost experts in his field. He is the current President of The Society of Jewellery Historians, having held the position since February 2018, and was appointed visiting professor of Ancient Jewellery, Material and Technology, at the Birmingham School of Jewellery Birmingham City University in 2019
Red beryl, formerly known as bixbite and marketed as red emerald or scarlet emerald, is an extremely rare variety of beryl as well as one of the rarest minerals on Earth. The gem gets its red color from manganese ions embedded inside of beryllium aluminium cyclosilicate crystals. The color of red beryl is stable up to 1,000 °C (1,830 °F). Red beryl can come in various tints like strawberry, bright ruby, cherry, and orange.
References
- ↑ CIG History Archived 2010-11-14 at the Wayback Machine Canadian Institute of Gemmology website, accessed November 4, 2011
