Minerals in Sri Lanka

Logan Sapphire

Logan Sapphire

Logan Sapphire (Sinhala: ලෝගන් නිල් මැණික; Tamil: லோகன் நீலக்கல்) is a world-famous faceted blue sapphire discovered from Sri Lanka. Sri Lankan sapphires are typically light to medium blue in color. The Logan Sapphire is blue in color with very slight violet overtones (Feather, 2016). A Gemological Institute of America (GIA) report dated June 1997 revealed that the color of this stone is natural and it had not been treated with heat (Feather, 2016). Presently, the stone is housed in the Smithsonian Institute's Museum of Natural History alongside the Bismarck Sapphire Necklace and the Hall Sapphire and Diamond Necklace. It is the heaviest mounted gem in their collection (Feather, 2016). The stone which weighing 422.98 carats (84.6 g) is set in a silver and gold brooch surrounded by round brilliant-cut 20 diamonds totaling 16 carats (Clark, 1998; Feather, 2016). The stone belonged to Sir Ellice Victor Sassoon (1881-1961), the third Baronet of Bombay (Feather, 2016). He is supposed to h…

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