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Line 11: The sapphire was mined from [[Sri Lanka]].<ref name="hansen">{{cite book \|last=Hansen \|first=Robin \|year=2022 \|title=Gemstones: A Concise Reference Guide \|publisher=[[Princeton University Press]] \|page=81 \|isbn=978-0-691-21448-1 \|oclc=1261879655}}</ref> It likely originates from [[Ratnapura]], the "City of Gems".<ref name="hansen" /><ref>{{cite journal \|last=Saul \|first=John M. \|year=2018 \|title=Transparent gemstones and the most recent supercontinent cycle \|journal=[[International Geology Review]] \|volume=60 \|issue=7 \|page=892 \|doi=10.1080/00206814.2017.1354730}}</ref> One of its early owners was [[Sir Victor Sassoon]], 3rd Baronet of Bombay, a member of the wealthy [[Sassoon family]]. According to the [[Smithsonian Institution]], the Sassoons may have acquired the sapphire from an Indian [[maharaja]]. Sassoon planned to auction the sapphire in 1941 to raise money for the British war effort during [[World War II]], but the auction did not take place.<ref name="feather">{{cite journal \|last=Feather II \|first=Russell C. \|year=2016 \|title=The Royal-Blue Logan Sapphire at the Smithsonian Institution \|journal=Rocks & Minerals \|volume=91 \|issue=1 \|page=59 \|doi=10.1080/00357529.2016.1099135}}</ref> In the early 1950s, the American ~~diplotmat~~diplomat [[M. Robert Guggenheim]] purchased the sapphire from Sassoon as a Christmas and anniversary present for his wife, Rebecca Pollard Guggenheim.<ref name="feather" /> She gifted it to the Smithsonian Institution in December 1960, a year after Robert's death. Rebecca Guggenheim changed her surname to Logan in 1962 after remarrying to John A. Logan, a management consultant, and the sapphire became known as the "Logan Sapphire".<ref name="feather" /><ref>{{cite news \|title=Rebecca P. Logan, 90, Art Patron and Hostess \|url=https://www.nytimes.com/1994/03/16/obituaries/rebecca-p-logan-90-art-patron-and-hostess.html \|access-date=March 27, 2022 \|work=[[The New York Times]] \|date=March 16, 1994 \|archive-url=https://web.archive.org/web/20160305190633/https://www.nytimes.com/1994/03/16/obituaries/rebecca-p-logan-90-art-patron-and-hostess.html \|archive-date=March 5, 2016 \|url-status=live}}</ref> It was one of several gifts from wealthy donors that came after the Smithsonian's acquisition of the [[Hope Diamond]] in 1958; another was the [[Napoleon Diamond Necklace]].<ref name="post">{{cite book \|last=Post \|first=Jeffrey E. \|year=1997 \|title=The National Gem Collection \|url=https://archive.org/details/nationalgemcolle00nati/mode/2up \|url-access=registration \|publisher=[[National Museum of Natural History]] \|pages=18, 59 \|isbn=978-0-8109-3690-4 \|oclc=1036788878}}</ref> Its ownership was transferred to the Smithsonian in April 1971.<ref name="feather" /> As of 2022, the Logan Sapphire is on display in the National Gem Collection of the [[National Museum of Natural History]] in Washington, D.C. (catalog number NMNH G3703-00).<ref name="website">{{cite web \|title=Logan Sapphire \|url=https://geogallery.si.edu/10002687/logan-sapphire \|publisher=[[National Museum of Natural History]] \|access-date=March 27, 2022 \|archive-url=https://web.archive.org/web/20210528090626/https://geogallery.si.edu/10002687/logan-sapphire \|archive-date=May 28, 2021 \|url-status=live}}</ref> It is the largest and heaviest mounted gem in the collection.<ref name="feather" /><ref name="website" />

Logan Sapphire: Difference between revisions