emerald Green
Emerald - Wikipedia. Emerald is a gemstone and a variety of the mineralberyl (Be. Al. 2(Si. O3)6) colored green by trace amounts of chromium and sometimes vanadium. Emerald is a cyclosilicate. Etymology. The word . Before the 2. 0th century, jewelers used the term water, as in . Normally, in the grading of colored gemstones, color is by far the most important criterion. However, in the grading of emeralds, clarity is considered a close second. A fine emerald must possess not only a pure verdant green hue as described below, but also a high degree of transparency to be considered a top gem. Located in Hastings Minnesota in Dakota County, Emerald Greens GC is the Newest Premier 36 Hole Golf Course just minutes south of the Twin Cities. Introducing Pantone Color of the Year 2013: Emerald green. Find out more about this intriguing color and its many applications in fashion, beauty, decor and design. Emerald, the green variety of Beryl, is the most famous and valuable green gemstone. Its beautiful green color, combined with durability and rarity, make it one of. Emerald Publishing; Emerald Group; 50th Anniversary; Emerald Management First; Emerald Bookstore; Emerald Careers; The Emerald Foundation. ![]() As a result, vanadium emeralds purchased as emeralds in the United States are not recognized as such in the UK and Europe. In America, the distinction between traditional emeralds and the new vanadium kind is often reflected in the use of terms such as . Thank you for taking the time to view our website and familiarizing yourself with Emerald Green, Inc. We believe you will agree that. Emerald is the green variety of the mineral beryl. It has been the world's most popular green gemstone for over 5000 years. Brief description of Emerald green: It's a poisonous copper-acetoarsenite developed in an attempt to improve Scheele's green in 1808 and commercially availble from 1814. Emeralds occur in hues ranging from yellow- green to blue- green, with the primary hue necessarily being green. Yellow and blue are the normal secondary hues found in emeralds. Only gems that are medium to dark in tone are considered emerald; light- toned gems are known instead by the species name green beryl. The finest emerald are approximately 7. In addition, a fine emerald should be well saturated and have a hue that is bright (vivid). Gray is the normal saturation modifier or mask found in emerald; a grayish- green hue is a dull- green hue. Unlike diamond, where the loupe standard, i. Thus, if an emerald has no visible inclusions to the eye (assuming normal visual acuity) it is considered flawless. Stones that lack surface breaking fissures are extremely rare and therefore almost all emeralds are treated (. The inclusions and fissures within an emerald are sometime described as . Eye- clean stones of a vivid primary green hue (as described above), with no more than 1. Faceted emeralds are most commonly given an oval cut, or the signature emerald cut, a rectangular cut with facets around the top edge. Treatments. Most emeralds are oiled as part of the post- lapidary process, in order to fill in surface- reaching cracks so that clarity and stability are improved. Cedar oil, having a similar refractive index, is often used in this widely adopted practice. Other liquids, including synthetic oils and polymers with refractive indexes close to that of emerald, such as Opticon, are also used. These treatments are typically applied in a vacuum chamber under mild heat, to open the pores of the stone and allow the fracture- filling agent to be absorbed more effectively. Federal Trade Commission requires the disclosure of this treatment when an oil treated emerald is sold. Other treatments, for example the use of green- tinted oil, are not acceptable in the trade. These categories reflect levels of enhancement, not clarity. A gem graded none on the enhancement scale may still exhibit visible inclusions. Laboratories apply these criteria differently. Some gemologists consider the mere presence of oil or polymers to constitute enhancement. Others may ignore traces of oil if the presence of the material does not improve the look of the gemstone. Traditional research used qualitative guidelines such as an emerald’s color, style and quality of cutting, type of fracture filling, and/or the anthropological origins of the artifacts bearing the mineral to determine the emerald's mine location. More recent studies using energy dispersive X- ray spectroscopy methods have uncovered trace chemical element differences between emeralds; even emeralds mined within close proximity to one another. American gemologist David Cronin and his colleagues have extensively examined the chemical signatures of emeralds resulting from fluid dynamics and subtle precipitation mechanisms, and their research demonstrated the chemical homogeneity of emeralds from the same mining location and the statistical differences that exist between emeralds from different mining locations, including those between the three locations: Muzo, Coscuez, and Chivor, in Colombia, South America. The first commercially successful emerald synthesis process was that of Carroll Chatham, likely involving a lithium vanadate flux process, as Chatham's emeralds do not have any water and contain traces of vanadate, molybdenum and vanadium. Gilson's emeralds are usually grown on natural colorless beryl seeds, which are coated on both sides. Growth occurs at the rate of 1 mm per month, a typical seven- month growth run producing emerald crystals of 7 mm of thickness. These stones were initially sold under the names . Later, from 1. 96. Linde Division of Union Carbide produced completely synthetic emeralds by hydrothermal synthesis. According to their patents (attributable to E. M. Also, it is important that the silicon- containing nutrient be kept away from the other ingredients to prevent nucleation and confine growth to the seed crystals. Growth occurs by a diffusion- reaction process, assisted by convection. The largest producer of hydrothermal emeralds today is Tairus in Russia, which has succeeded in synthesizing emeralds with chemical composition similar to emeralds in alkaline deposits in Colombia, and whose products are thus known as “Colombian Created Emeralds” or “Tairus Created Emeralds”. Many synthetics are also UV inert. Federal Trade Commission (FTC) has very strict regulations as to what can and what cannot be called . On one of Cortez's most notable emeralds he had the text engraved, Inter Natos Mulierum non sur- rexit mayor (. National Museum of Natural History. Emerald crystal (about 1 cm) in calcite matrix, Muzo, Colombia. A 5- carat emerald from Muzo with hexagonal cross- section. See also. References^ abc. ISBN 0- 4. 71- 5. Gemological Institute of America. Retrieved 1 November 2. Online Etymology Dictionary. William Crooke; Vol. Brunswick House Press, p. ISBN 0- 9. 72. 82. Read, Peter (2. 00. Gemmology, 3rd rev. ISBN 0. 71. 98. 03. Grading Fancy- Color Diamonds. Gemological Institute of America^Bonewitz, R. ISBN 0. 75. 66. 33. Emerald Quality Factors. Gemological Institute of America.^Liccini, Mark. Understanding Emerald Enhancements and Treatments. International Gem Society^ ab. Federal Trade Commission. Retrieved 3. 0 March 2. Jewelry & Gems, the Buying Guide: How to Buy Diamonds, Pearls, Colored Gemstones, Gold & Jewelry with Confidence and Knowledge. Retrieved 3. 0 March 2. Bibcode: 2. 00. 0Sci.. G. Retrieved 1. 4 June 2. Two tectonic settings for one mineralization. Bibcode: 1. 99. 9Geo.. B. Informe de contrato 1. INGEOMINAS^Wacaster, Susan (March 2. United States Geological Survey. Retrieved 7 August 2. UOL (2. 01. 2- 0. Emeralds in the Yukon Territory. Yukon Geological Survey.^Cronin, David; Rendle, Andy (2. Archived from the original on November 1. Dordrecht: Springer Netherlands. Patent 3,5. 67,6. Issue date: March 2, 1. Schmetzer, Karl; Schwartz, Dietmar; Bernhardt, Heinz- Jurgen; Tobias Hager (2. Journal of Gemmology of Gemmological Association of Great Britain. Archived from the original(PDF) on July 1. ISBN 0- 4. 71- 5. Morgan, Diane (2. From Satan's crown to the holy grail : emeralds in myth, magic, and history. Retrieved 3. 0 March 2. Magic of Jewels and Charms. Philadelphia: Lippincott Company. The Daily Telegraph, UK. Retrieved December 3. Cable News Network (Turner Broadcasting System, Inc.). The News & Observer. The News & Observer Publishing Co. Archived from the original on 2. CRPG: Le Centre de Recherches P. Retrieved 8 February 2. National Museum of Natural History. Smithsonian Institution. Retrieved February 8, 2. Further reading. Ali, Saleem H. The Emerald City: Emerald mining in Brazil (+Gemstone mining in other countries) http: //www. Cooper, J. Brewer's Myth and Legend. New York: Cassell Publishers Ltd. ISBN 0- 3. 04- 3. Hurlbut, Cornelius S.; Klein, Cornelis (1. Manual of Mineralogy (2. New York: John Wiley and Sons. ISBN 0- 4. 71- 8. Sinkankas, John (1. Emerald & Other Beryls. Prescott, Ariz.: Geoscience Press. ISBN 0- 8. 01. 9- 7. Tavernier, Jean- Baptiste (1. Travels in India (second edition), Volume II. Edited by William Crooke and translated by V. London: Oxford University Press. Weinstein, Michael (1. The World of Jewel Stones. New York: Sheriden House. OCLC 5. 19. 75. 8. Wise, Richard W. Secrets of the Gem Trade: The Connoisseur's Guide to Precious Gemstones. Lenox, Mass.: Brunswick House Press. Online Emerald chapters. External links. Gemstones. Gemmological Classifiactions by E. Kievlenko, 1. 98. Jewelry stones. 1st order. Jewelry- Industrialstones. Industrial stones.
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