Logan Sapphire

The Logan Sapphire Brooch, National Museum of Natural History, Washington DC

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).

The cushion-cut stone is one of the world's largest and most famous sapphires (its size about that of an egg) that was cut from a crystal mined in Sri Lanka. The Logan Sapphire is named after Mrs. Polly Logan, who donated the gemstone to the Smithsonian Institution in 1960.[1]

The Logan Sapphire is set in a brooch surrounded by 20 round brilliant cut diamonds weighing, in total, 16 carats (3.2 g). It is currently on display at the National Museum of Natural History in Washington, D.C., alongside the Bismarck Sapphire Necklace and the Hall Sapphire and Diamond Necklace.[2][3]

References

  1. ↑ "Logan Sapphire [G3703]". Smithsonian National Museum of Natural History. Retrieved 20 July 2016.
  2. ↑ The Logan Sapphire Brooch
  3. ↑ Corundum (variety: Sapphire)
Wikimedia Commons has media related to Logan Sapphire.


This article is issued from Wikipedia - version of the 11/27/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.