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Includes research and field reports on GE POL diamonds before/after HPHT processing, distinctive sapphires from Northern Madagascar, and pre-Columbian gems and materials from Antigua. Regular sections cover trade lab notes, gem news, challenge winners, book reviews, and gemological abstracts, alongside editorial and production staff information.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":15,"@type":76,"position":81},"https://docshare.wps.com/document/literature/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/gems-gemology-fall-2000-volume-36-no-3/657902/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/gems-gemology-fall-2000-volume-36-no-3/657902.png","ImageObject",300,407,{"name":92,"@type":93},"Grenda","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-10-26",true,{"@type":102,"interactionType":103,"userInteractionCount":24},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What does the editorial discuss about new diamond treatments?","Question",{"text":112,"@type":113},"It explains how new diamond treatments affect interpretation and what they mean for the gemological laboratory’s identification work.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Which gemological study is highlighted in the feature articles about diamonds?",{"text":117,"@type":113},"The issue includes a study on GE POL diamonds, examining key clues by comparing diamonds before and after HPHT processing.",{"name":119,"@type":110,"acceptedAnswer":120},"What topics are covered in the regular features section?",{"text":121,"@type":113},"Regular features include gem trade lab notes, gem news updates, challenge winners, book reviews, and gemological abstracts.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},657902,1793080639,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":14,"category_name":15,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":24,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145},7971474921005,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","| FALL 2000 VOLUME 36 NO. 3 pg. 197 |  |  |\n| --- | --- | --- |\n| | | EDITORIAL\u003Cbr>New Diamond Treatments: What Do They Mean for the Gemological Laboratory?\u003Cbr>William E. Boyajian\u003Cbr>LETTERS\u003Cbr>FEATURE ARTICLES\u003Cbr>GE POL Diamonds: Before and After\u003Cbr>Christopher P. Smith, George Bosshart, Johann Ponahlo, Vera M. F. Hammer, Helmut Klapper, and Karl Schmetzer\u003Cbr>The first study of GE POL diamonds before and after HPHT processing reveals important clues to their identification.\u003Cbr>Sapphires from Antsiranana Province, Northern Madagascar\u003Cbr>Dietmar Schwarz, Jan Kanis, and Karl Schmetzer\u003Cbr>Learn the distinctive features of blue-green-yellow sapphires from the important basaltic deposits near Ambondromifehy.\u003Cbr>Pre-Columbian Gems and Ornamental Materials from Antigua, West Indies\u003Cbr>A. Reg Murphy, David J. Hozjan, Christy N. de Mille, and Alfred A. Levinson\u003Cbr>Nondestructive gemological techniques are used to identify ancient jewelry materials of the Saladoid culture and suggest early trade patterns in the eastern Caribbean islands.\u003Cbr>NOTES AND NEW TECHNIQUES\u003Cbr>Gem-Quality Haüyne from the Eifel District, Germany\u003Cbr>Lore Kiefert and H. A. Hänni\u003Cbr>Explore the properties of this rare bright blue gem. |\n| REGULAR FEATURES\u003Cbr>254 Gem Trade Lab Notes\u003Cbr>• Cat’s-eye chrysoberyl • HPHT-annealed blue and pink diamonds • Diamonds with flower-like inclusions\u003Cbr>• Historical diamond report • Black synthetic moissanite • Fracture fillers in ruby • Paraíba tourmaline\u003Cbr>260 Gem News\u003Cbr>• APEC 2000 report • De Beers’s new direction • Mosaic ammonite • Iranian anhydrite • Indian aquamarine\u003Cbr>• Hawaiian “precious” coral • Fresnoite • International Geological Congress report • Malagasy lapidary facility\u003Cbr>• Ruby and sapphire from Colombia • Lavender sugilite with green spots • Paraíba tourmaline update • “Winebottle” tourmaline • Magnetic hematite imitation • Boulder opal imitations • Concave faceting of sapphires\u003Cbr>275 2000 Challenge Winners\u003Cbr>277 Book Reviews\u003Cbr>280 Gemological Abstracts |  |  |\n\nEDITORIAL STAFF  \nEditor-in-Chief  \nRichard T. Liddicoat  \nPublisher  \nWilliam E. Boyajian  \nAssociate Editor  \nJohn Sinkankas  \nTechnical Editor  \nCarol M. Stockton  \nAssistant Editor  \nStuart Overlin  \ne-mail: [soverlin@gia.edu](soverlin@gia.edu)  \nContributing Editor  \nJohn I. Koivula  \nEditor  \nAlice S. Keller 5345 Armada Drive Carlsbad, CA 92008 (760) 603-4504  \ne-mail: [akeller@gia.edu](akeller@gia.edu)  \nSenior Editor  \nBrendan Laurs  \n[e-mail: blaurs@gia.edu](e-mail: blaurs@gia.edu)  \nSubscriptions  \nDebbie Ortiz  \n(800) 421-7250, ext. 7142  \nFax: (760) 603-4595  \ne-mail: [dortiz@gia.edu](dortiz@gia.edu)  \nEditors, Gem Trade Lab Notes  \nThomas M. Moses Ilene Reinitz Shane F. McClure  \nEditors, Gem News  \nMary L. Johnson, John I. Koivula, Dino DeGhionno, and  \nShane F. McClure  \nEditors, Book Reviews  \nSusan B. Johnson  \nJana E. Miyahira-Smith  \nEditor, Gemological Abstracts  \nA. A. Levinson  \n\n| PRODUCTION STAFF | Art Director\u003Cbr>Karen Myers | Production Assistant\u003Cbr>Carole Johnson | WEB SITE\u003Cbr>[http://www.gia.edu/gandg](http://www.gia.edu/gandg) |\n| --- | --- | --- | --- |\n| EDITORIAL REVIEW BOARD | Alan T. Collins\u003Cbr>London, United Kingdom G. Robert Crowningshield New York, New York\u003Cbr>John Emmett\u003Cbr>Brush Prairie, Washington Emmanuel Fritsch Nantes, France\u003Cbr>C. W. Fryer\u003Cbr>Santa Monica, California Henry A. Hänni\u003Cbr>Basel, Switzerland\u003Cbr>C. S. Hurlbut, Jr.\u003Cbr>Cambridge, Massachusetts | Alan Jobbins\u003Cbr>Caterham, United Kingdom Mary L. Johnson Carlsbad, California Anthony R. Kampf Los Angeles, California Robert E. Kane\u003Cbr>San Diego, California John I. Koivula\u003Cbr>Carlsbad, California\u003Cbr>A. A. Levinson\u003Cbr>Calgary, Alberta, Canada Thomas M. Moses New York, New York | Kurt Nassau\u003Cbr>P. O. Lebanon, New Jersey George Rossman Pasadena, California Kenneth Scarratt New York, New York Karl Schmetzer Petershausen, Germany James E. Shigley Carlsbad, California Christopher P. Smith Lucerne, Switzerland |\n| SUBSCRIPTIONS\u003Cbr>MANUSCRIPT SUBMISSIONS\u003Cbr>CO","cbCaimC73d2DJH7s","https://ap.wps.com/l/cbCaimC73d2DJH7s","pdf",4243237,103,"English","# Editorial\n## New Diamond Treatments: What Do They Mean for the Gemological Laboratory?\n# Letters\n# Feature Articles\n## GE POL Diamonds: Before and After\n## Sapphires from Antsiranana Province, Northern Madagascar\n## Pre-Columbian Gems and Ornamental Materials from Antigua, West Indies\n# Notes and New Techniques\n## Gem-Quality Haüyne from the Eifel District, Germany\n# Regular Features\n## Gem Trade Lab Notes\n## Gem News\n## 2000 Challenge Winners\n## Book Reviews\n## Gemological Abstracts","[{\"question\":\"What does the editorial discuss about new diamond treatments?\",\"answer\":\"It explains how new diamond treatments affect interpretation and what they mean for the gemological laboratory’s identification work.\"},{\"question\":\"Which gemological study is highlighted in the feature articles about diamonds?\",\"answer\":\"The issue includes a study on GE POL diamonds, examining key clues by comparing diamonds before and after HPHT processing.\"},{\"question\":\"What topics are covered in the regular features section?\",\"answer\":\"Regular features include gem trade lab notes, gem news updates, challenge winners, book reviews, and gemological abstracts.\"}]","Gems & Gemology - Fall 2000 Volume 36 No. 3 | PDF",1792993851,159]