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Black, gray, brown
A variety of Diamond

A massive, opaque, gray, brown, or black variety of diamond used as an abrasive and in rock drills.

Five different theories for the formation of carbonado have been discussed (cf. Sautter et al. 2011).

Classification of Carbonado

Physical Properties of Carbonado

Black, gray, brown

Chemical Properties of Carbonado

Elements listed in formula:

Other Names for Carbonado

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Carbonado

Reference List:
J. Garai, S. E. Haggerty, S. Rekhi & M. Chance (2006): Infrared Absorption Investigations Confirm the Extraterrestrial Origin of Carbonado-Diamonds. The Astrophysical Journal Letters, 653, L153-L156. []

Sautter, Violaine; Lorand, Jean -Pierre; Cordier, Patrick; Rondeau, Benjamin; Leroux, Hugues; Ferraris, Cristiano; Pont, Sylvain (2011): Petrogenesis of mineral micro-inclusions in an uncommon carbonado. European Journal of Mineralogy 23, 721-729.

Internet Links for Carbonado URL:
Please feel free to link to this page.

Localities for Carbonado

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Derby, O. A. (1907). The geology of the diamond and carbonado washings of Bahia, Brazil. Government Printing Office. Smithsonian Report for 1906 pp215-221
    • Chapada Diamantina
Herold, M. W., & Rines, S. (2014). A Half-century monopoly (1880-1930s): the black diamonds (carbonados) of Bahia and Jewish Merchants. Revista Ciências Administrativas, 17(1)
Herold, M. W., & Rines, S. (2014). A Half-century monopoly (1880-1930s): the black diamonds (carbonados) of Bahia and Jewish Merchants. Revista Ciências Administrativas, 17(1)
  • Eastern-Siberian Region
    • Sakha Republic (Saha Republic; Yakutia)
      • Aldan Shield
        • Aldan
Shcheka, S. A., Ignat’ev, A. V., Nechaev, V. P., & Zvereva, V. P. (2006). First diamonds from placers in Primorie. Petrology, 14(3), 299-317.
  • Bolívar
    • Santa Elena de Uairen
NEWMAN, José Albino et al. Mineralogical characterization of the diamond of the alluvial placer from Icabaru River, Santa Elena de Uairén, Bolivar State, Venezuela. Rev. Asoc. Geol. Argent. [online]. 2009, vol.64, n.3, pp. 472-480.
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