Dom Pedro aquamarine

Dom Pedro Aquamarine
General
Category	Oxide mineral [1][2]
Formula (repeating unit)	Be3Al2Si6O18

The Dom Pedro aquamarine is the world's largest cut aquamarine gem. It was cut from a crystal originally weighing approximately 100 pounds (45 kg) and measuring more than 3 feet (0.91 m) in length. The stone was mined in the state of Minas Gerais in Brazil around 1980, and named after the Brazilian emperors Pedro I and Pedro II. The blue-green gemstone was cut by Bernd Munsteiner into an obelisk form weighing 10,363 carats. The finished dimensions measure 14 inches (36 cm) tall by 4 inches (10 cm) wide. The jewel was donated to the Smithsonian Institution by Jane Mitchell and Jeffery Bland. It is housed in the National Museum of Natural History's Janet Annenberg Hooker Hall of Geology.^[3][4]

References

1. Beryl mineral information and data, Mindat
2. Quartz page on Mineralien Atlas
3. Vastag, Brian (2 December 2012). "The Dom Pedro aquamarine’s long and winding path to the Smithsonian". The Washington Post. Retrieved 7 December 2012.
4. "Magnificent Dom Pedro aquamarine to go on view in the Smithsonian’s Natural History Museum". Smithsonian Science. Smithsonian Institution. Retrieved 7 December 2012.