Sergio (carbonado) explained
The Sergio (Portuguese: Carbonado do Sérgio) was the largest carbonado and the largest rough diamond ever dug up on earth.[1] It weighed 3167carat and was found above ground in Lençóis (State of Bahia, Brazil) in 1895 by Sérgio Borges de Carvalho. Like other carbonados, it is believed to be of meteoritic origin.[2] [3] [4] [5] [6] [7] [8] [9]
The Sergio was first sold for $16,000 and later for to Joalheria Kahn and Co. and shipped to G. Kahn in Paris, who sold it to I. K. Gulland of London in September 1895 for . It was then broken up into small NaNadj=onNaNadj=on pieces as industrial diamond drills.[10]
See also
Notes and References
- Web site: William . Stephen E. . Carbonado Diamond: A Review of Properties and Origin . Summer 2017. 4 April 2018. Gemological Institute of America.
- Web site: Carbonado - A possible relic from Uranus or Neptune. meteoritestudies.com. 15 February 2013.
- Frederick William . Rudler . Carbonado . 5 . 307.
- Web site: Broad . William J. . Giant Black Diamonds Of Mysterious Origin May Hail From Space . 17 September 1996. 4 April 2018. New York Times.
- Web site: Diamonds in the Sky. www.pbs.org. February 2000 .
- Ralf Tappert, Michelle C. Tappert "Diamonds in Nature: A Guide to Rough Diamonds", p. 41
- Mark A. Prelas, Galina Popovici, Louis K. Bigelow (eds.) "Handbook of Industrial Diamonds and Diamond Films", p. 484
- http://shell.cas.usf.edu/~juster/GLY4921/carbonado%20diamond%20paper.pdf G.J.H. McCall, "The carbonado diamond conundrum"
- http://geosphere.gsapubs.org/content/early/2013/08/14/GES00908.1.full.pdf R.A. Ketcham, "New textural evidence on the origin of carbonado diamond: An example of 3-D petrography using X-ray computed tomography" Geosphere, GES00908.1, first published on August 14, 2013
- Web site: Herold . Marc W. . The Black Diamonds of Bahia (Carbonados) and the Building of Euro-America: A Half-century Supply Monopoly (1880s-1930s) . 12 . April 2013. 4 April 2018. University of New Hampshire.
