[Rockhounds] Sotheby's unveils 555.55-carat black diamond thought to come from outer space

[Paul]

Kreigh  wrote,

 > Auction house Sotheby's Dubai has unveiled a diamond that's literally 
from
 > out of this world.
 >
 > Photo and more details at
 > 
https://www.npr.org/2022/01/17/1073703748/sothebys-unveils-555-55-carat-black-diamond-thought-to-come-from-outer-space

Some papers:

Haggerty, S.E., 2017. Carbonado diamonds: A review of properties and 
origin.
Gems & Gemology, 53(2).
https://www.researchgate.net/publication/319179710_Carbonado_Diamond_A_Review_of_Properties_and_Origin

Garai, J., Haggerty, S.E., Rekhi, S. and Chance, M., 2006. Infrared 
absorption
investigations confirm the extraterrestrial origin of carbonado 
diamonds. The
Astrophysical Journal Letters, 653(2), p.L153.
PDF of paper: https://iopscience.iop.org/article/10.1086/510451/pdf
Abstract of paper: https://iopscience.iop.org/article/10.1086/510451/meta

Demény, A., Nagy, G., Bajnóczi, B., Németh, T., Garai, J., Drozd, V. and 
Hegner,
E., 2011. Hydrogen isotope compositions in carbonado diamond: 
constraints on
terrestrial formation. Central European Geology, 54(1-2), pp.51-74.
https://www.academia.edu/4830762/Hydrogen_isotope_compositions_in_carbonado_diamonds_constraints_on_terrestrial_formation
PDF of paper: http://real.mtak.hu/55082/1/ceugeol.54.2011.1-2.6.pdf

Your,

Paul H.