220:, she recalled her reaction upon seeing it: "I was simply overcome. It's simply not a stone you could wear casually. All I could think was, I'll never be able to wear it. And of course, I loved it." She often wore it on a clip at formal events, but the sapphire was so heavy that she had to wear it with a shoulder strap. In December 1960, a year after Robert's death, Rebecca deeded four-sevenths of it to the Smithsonian Institution, and the remaining portion the following year. This transaction was only in deed; the sapphire was not physically divided, and it was not publicly exhibited until almost a decade later. She wanted it to be reserved to be worn only by the
174:
33:
185:, known as the "City of Gems". A New York jeweler who possessed the sapphire claimed that its first owner was a Sri Lankan native who was beheaded for withholding his discovery from his leader. However, this story is likely fabricated. One of the sapphire's early owners was
227:
Rebecca
Guggenheim changed her surname to Logan in 1962 after marrying John A. Logan, a management consultant, and the sapphire became known as the "Logan Sapphire". It was the first of several gifts from wealthy donors that came after the Smithsonian's acquisition of the
236:. The Logan Sapphire was physically transferred to the Smithsonian in April 1971. According to Paul Desautels, the museum's curator at the time, Logan finally parted ways with the sapphire because it reminded her of her late husband's extramarital affairs.
104:(84.596 g) and is approximately the size of a large chicken egg, measuring 49.23 mm Ă— 38.26 mm Ă— 20.56 mm (1.938 in Ă— 1.506 in Ă— 0.809 in). It is a mixed cushion-cut
165:
by
Rebecca Pollard Guggenheim, its owner at the time, suggests that it was set in the brooch sometime after she had acquired it several years earlier, but further details of its setting are unknown.
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76:
in 1960. The sapphire's name is derived from
Rebecca's new surname after marrying John A. Logan. It has been displayed in the National Gem Collection of the
159:. In total, the diamonds weigh approximately 16 carats (3.2 g). The diamonds were likely taken from an antique bracelet or necklace. A 1958 article in
108:(having a rounded rectangular shape) and is blue with slight shades of violet. The cut is designed to highlight its color rather than to improve its
935:
80:
in
Washington, D.C., since 1971. It is a mixed cushion-cut sapphire, approximately the size of a large chicken egg, and set in a silver and gold
181:
The sapphire was mined from Sri Lanka. It is a "Ceylon sapphire", a term derived from the former name of Sri Lanka, and likely originates from
216:
purchased the sapphire from
Sassoon. He gave it to his wife, Rebecca Pollard Guggenheim, as a Christmas and anniversary present in 1952. In
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in
Washington, D.C. (catalog number NMNH G3703-00). It is the largest and heaviest mounted gem in the collection.
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224:"at such state and other occasions as may be appropriate", though it has never been used for this purpose.
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radiation. This phenomenon, as well as the slight violet tones, indicates trace amounts of the element
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120:, a technique that is sometimes used to enhance the color or mechanical properties of gemstones. It
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205:. Sassoon planned to auction the sapphire in 1941 to raise money for the British war effort during
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determined that the Logan
Sapphire's color was natural and that it had not previously undergone
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Feather II, Russell C. (2016). "The Royal-Blue Logan
Sapphire at the Smithsonian Institution".
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Since 1971, the Logan
Sapphire has been on display in the National Gem Collection of the
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Saul, John M. (2018). "Transparent gemstones and the most recent supercontinent cycle".
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The
Smithsonian National Gem Collection—Unearthed: Surprising Stories Behind the Jewels
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as a gift for his wife, Rebecca Pollard Guggenheim, who donated the sapphire to the
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White, John Sampson (1986). "The Nation's Gem Collection – One Hundred Years".
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517:
Domanski, Marian; Webb, John (2007). "A Review of Heat Treatment Research".
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sapphires, are visible inside the gemstone. It is set in a silver and gold
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197:, the Sassoons may have acquired the sapphire from an Indian
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439:Manutchehr-Danai, Mohsen (2013). "Cushion cut".
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360:Post, Jeffrey Edward (2021). "Logan Sapphire".
728:"Rebecca P. Logan, 90, Art Patron and Hostess"
135:The Logan Sapphire is one of the largest blue
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64:sapphires in the world, it was owned by
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936:Jewelry in the Smithsonian Institution
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601:Gemstones: A Concise Reference Guide
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809:Hall Sapphire and Diamond Necklace
740:from the original on March 5, 2016
706:10.17704/eshi.5.2.u17x334607410321
565:National Museum of Natural History
411:National Museum of Natural History
241:National Museum of Natural History
143:inclusions, commonly found inside
78:National Museum of Natural History
38:National Museum of Natural History
25:
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100:The Logan Sapphire weighs 422.98
114:Gemological Institute of America
834:Queen Marie of Romania Sapphire
445:Springer Science+Business Media
441:Dictionary of Gems and Gemology
222:First Lady of the United States
124:reddish-orange when exposed to
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531:10.1080/01977261.2007.11721052
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660:10.1080/00206814.2017.1354730
316:10.1080/00357529.2016.1099135
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177:The Logan Sapphire on display
132:in the sapphire's structure.
900:List of individual gemstones
639:International Geology Review
258:List of individual gemstones
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559:The National Gem Collection
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151:and surrounded by 20 round
36:The Logan Sapphire brooch,
10:
952:
799:Bismarck Sapphire Necklace
605:Princeton University Press
203:1939 New York World's Fair
201:. It was exhibited at the
189:, a member of the wealthy
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60:. One of the largest blue
895:List of sapphires by size
887:
794:
555:Post, Jeffrey E. (1997).
253:List of sapphires by size
234:Napoleon Diamond Necklace
232:in 1958; another was the
804:Black Star of Queensland
139:sapphires in the world.
195:Smithsonian Institution
84:surrounded by 20 round
74:Smithsonian Institution
29:423-carat blue sapphire
814:James J. Hill Sapphire
686:Earth Sciences History
599:Hansen, Robin (2022).
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68:and then purchased by
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476:O'Neil, Paul (1983).
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35:
931:Individual sapphires
849:Serendipity Sapphire
844:St Edward's Sapphire
296:Rocks & Minerals
218:Ladies' Home Journal
214:M. Robert Guggenheim
162:Ladies' Home Journal
70:M. Robert Guggenheim
926:Individual brooches
824:Millennium Sapphire
698:1986ESHis...5..159W
652:2018IGRv...60..889S
567:. pp. 18, 59.
447:. p. 80, 120.
308:2016RoMin..91...59F
193:. According to the
736:. March 16, 1994.
733:The New York Times
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66:Sir Victor Sassoon
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40:, Washington, D.C.
921:Gems of Sri Lanka
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614:978-0-691-21448-1
574:978-0-8109-3690-4
519:Lithic Technology
495:978-0-8094-4500-4
454:978-3-662-04288-5
375:978-1-68335-940-1
16:(Redirected from
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854:The Star of Adam
839:Ruspoli Sapphire
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413:. Archived from
407:"Logan Sapphire"
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52:(84.596 g)
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859:Star of Artaban
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417:on May 28, 2021
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891:Related topics
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18:Logan sapphire
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742:. Retrieved
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419:. Retrieved
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366:Abrams Books
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230:Hope Diamond
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207:World War II
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48:is a 422.98-
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126:ultraviolet
96:Description
915:Categories
692:(2): 167.
646:(7): 892.
623:1261879655
583:1036788878
525:(2): 154.
504:1033664759
384:1242914179
264:References
145:Sri Lankan
122:fluoresces
110:brilliance
788:sapphires
744:March 27,
668:133653573
539:128016597
486:Time Life
480:Gemstones
463:851374055
421:March 27,
324:131247266
302:(1): 59.
183:Ratnapura
153:brilliant
86:brilliant
58:Sri Lanka
738:Archived
714:24138665
247:See also
199:maharaja
157:diamonds
130:chromium
106:sapphire
90:diamonds
54:sapphire
694:Bibcode
648:Bibcode
304:Bibcode
169:History
137:faceted
62:faceted
786:Named
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149:brooch
141:Rutile
102:carats
82:brooch
710:JSTOR
664:S2CID
535:S2CID
320:S2CID
88:-cut
56:from
50:carat
746:2022
619:OCLC
609:ISBN
579:OCLC
569:ISBN
500:OCLC
490:ISBN
459:OCLC
449:ISBN
423:2022
380:OCLC
370:ISBN
155:cut
44:The
702:doi
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312:doi
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
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