The 422.99-carat Logan Blue Sapphire in its special brooch setting donated in 1960 to the National Museum of Natural history of the Smithsonian Institution by Mrs John A. Logan, is the heaviest mounted gem in the National Gem Collection, and undoubtedly one of the most popular exhibits in the Janet Annenberg Hooker Hall of Geology, Gems & Minerals of the NMNH of the Smithsonian Institution. A dedicated webpage on the Logan Blue Sapphire in the jewelry blog of internetstones.com published on March 10, 2008, is one of the most visited webpages of our extensive website, providing information on diamonds, pearls, colored stones, and minerals. The last paragraph of this webpage with the sub-title "Mrs John A. Logan" reads as follows :-
The above account of the “Logan Blue Sapphire” is not complete without a brief biography of Mrs. John A. Logan, who donated the renowned sapphire to the Smithsonian Institution. Attempts to find more details of Mrs. Logan had proved somewhat difficult. Readers who may have information about Mrs. Logan and her family are kindly requested to update this page with the required information.
Our request had three responses from three gracious ladies, two of whom were related to Mrs. John A. Logan and the third who was her personal accountant. Their valuable contribution served to enrich and update our webpage on the "Logan Blue Sapphire"
The following is the first contribution by Mrs. Jennifer Page, a granddaughter to Mrs John A. Logan, dated October 14, 2009 :-
October 14, 2009 at 6:43 pm
My mother, Beverly Pollard Page, is Mrs. Logan’s niece. As a child we visited “Aunt Polly” (Rebecca Pollard Guggenheim Logan) in Washington DC and her donated sapphire at the museum.