Rockefeller sapphire emerald cut ring
sapphire and diamond hat pin circa 1910
Logan sapphire
Art Deco Egyptian Revival pin
star of Bombay sapphire Edwardian engagement ring
Van Cleef & Arpels 10.51 carat Burmese sapphire and diamond ring photo from Betteridge
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For in depth information about sapphires refer to this GIA Encyclopedia (Gemological Institute of America) it’s a great reference for all things gems!