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'''Sergio''' (Portuguese '''Carbonado do |
'''Sergio''' (Portuguese '''Carbonado do Sérgio''') is the largest [[carbonado]] and the largest rough [[diamond]] ever found.<ref name="GIA">{{cite web | last=William |first=Stephen E. |title=Carbonado Diamond: A Review of Properties and Origin |url=https://www.gia.edu/gems-gemology/summer-2017-carbonado-diamond |date=Summer 2017|accessdate=4 April 2018|publisher=[[Gemological Institute of America]]}}</ref> It weighed {{convert|3167|carat|g ozt}} 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 [[meteorite|meteoritic]] origin.<ref>{{cite web|title=Carbonado - A possible relic from Uranus or Neptune|url=http://www.meteoritestudies.com/protected_CARBONAD.HTM|publisher=meteoritestudies.com|accessdate=15 February 2013}}</ref><ref>{{cite EB1911 |first=Frederick William |last=Rudler |wstitle=Carbonado |volume=5 |page=307}}</ref><ref name="NYT">{{cite web | last=Broad |first=William J. |title=Giant Black Diamonds Of Mysterious Origin May Hail From Space |url=https://www.nytimes.com/1996/09/17/science/giant-black-diamonds-of-mysterious-origin-may-hail-from-space.html |date=17 September 1996|accessdate=4 April 2018|publisher=[[New York Times]]}}</ref><ref>[https://www.pbs.org/wgbh/nova/space/diamonds-in-the-sky.html Diamonds in the Sky]</ref><ref>Ralf Tappert, Michelle C. Tappert "''Diamonds in Nature: A Guide to Rough Diamonds''", p. 41</ref><ref>Mark A. Prelas, Galina Popovici, Louis K. Bigelow (eds.) "''Handbook of Industrial Diamonds and Diamond Films''", p. 484</ref><ref>[http://shell.cas.usf.edu/~juster/GLY4921/carbonado%20diamond%20paper.pdf G.J.H. McCall, "''The carbonado diamond conundrum''"] {{webarchive|url=https://web.archive.org/web/20140221111337/http://shell.cas.usf.edu/~juster/GLY4921/carbonado%20diamond%20paper.pdf |date=2014-02-21 }}</ref><ref>[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]</ref> |
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''Sergio'' was first sold for $16,000 and later for $25,000 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 [[Pound sterling|₤]]6,400. There, it was broken up into small 3-6 carat pieces as industrial diamond drills.<ref name="UNH">{{cite web | last=Herold |first=Marc W. |title=The Black Diamonds of Bahia (Carbonados) and the Building of Euro-America: A Half-century Supply Monopoly (1880s-1930s) |url=https://commoditiesofempire.blogs.sas.ac.uk/files/2016/03/WP21.pdf |page=12 |date=April 2013|accessdate=4 April 2018|publisher=[[University of New Hampshire]]}}</ref> |
''Sergio'' was first sold for $16,000 and later for $25,000 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 [[Pound sterling|₤]]6,400. There, it was broken up into small 3-6 carat pieces as industrial diamond drills.<ref name="UNH">{{cite web | last=Herold |first=Marc W. |title=The Black Diamonds of Bahia (Carbonados) and the Building of Euro-America: A Half-century Supply Monopoly (1880s-1930s) |url=https://commoditiesofempire.blogs.sas.ac.uk/files/2016/03/WP21.pdf |page=12 |date=April 2013|accessdate=4 April 2018|publisher=[[University of New Hampshire]]}}</ref> |
Revision as of 22:26, 27 July 2018
Sergio (Portuguese Carbonado do Sérgio) is the largest carbonado and the largest rough diamond ever found.[1] It weighed 3,167 carats (633.4 g; 20.36 ozt) 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]
Sergio was first sold for $16,000 and later for $25,000 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 ₤6,400. There, it was broken up into small 3-6 carat pieces as industrial diamond drills.[10]
See also
References
- ^ William, Stephen E. (Summer 2017). "Carbonado Diamond: A Review of Properties and Origin". Gemological Institute of America. Retrieved 4 April 2018.
- ^ "Carbonado - A possible relic from Uranus or Neptune". meteoritestudies.com. Retrieved 15 February 2013.
- ^ Rudler, Frederick William (1911). Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol. 5 (11th ed.). Cambridge University Press. p. 307. . In
- ^ Broad, William J. (17 September 1996). "Giant Black Diamonds Of Mysterious Origin May Hail From Space". New York Times. Retrieved 4 April 2018.
- ^ Diamonds in the Sky
- ^ 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
- ^ G.J.H. McCall, "The carbonado diamond conundrum" Archived 2014-02-21 at the Wayback Machine
- ^ 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
- ^ Herold, Marc W. (April 2013). "The Black Diamonds of Bahia (Carbonados) and the Building of Euro-America: A Half-century Supply Monopoly (1880s-1930s)" (PDF). University of New Hampshire. p. 12. Retrieved 4 April 2018.