Logan sapphire
The Logan Sapphire is a flawless specimen from Sri Lanka, a cushion-cut stone which possesses a rich deep blue color and is the second largest (blue) sapphire known, weighing 422.99 carats (84.6 g). T...
High Definition Video of The Logan Sapphire Brooch
The famous Logan Sapphire was donated to the Smithsonian Institution in 1960. It is the second largest blue sapphire known and originated in Sri Lanka. The b...
The Logan Sapphire: A 423 Carat Blue Gem - YouTube
May 28, 2010 ... The famous Logan Sapphire was donated to the Smithsonian Institution in 1960. It is the second largest blue sapphire known and originated in ...