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Bibliographic details for Black opal

Citation styles for Black opal

APA style

Black opal. (2022, May 8). CAMEO, . Retrieved 00:22, January 17, 2026 from https://cameo.mfa.org/index.php?title=Black_opal&oldid=85499.

MLA style

"Black opal." CAMEO, . 8 May 2022, 13:46 UTC. 17 Jan 2026, 00:22 <https://cameo.mfa.org/index.php?title=Black_opal&oldid=85499>.

MHRA style

CAMEO contributors, 'Black opal', CAMEO, , 8 May 2022, 13:46 UTC, <https://cameo.mfa.org/index.php?title=Black_opal&oldid=85499> [accessed 17 January 2026]

Chicago style

CAMEO contributors, "Black opal," CAMEO, , https://cameo.mfa.org/index.php?title=Black_opal&oldid=85499 (accessed January 17, 2026).

CBE/CSE style

CAMEO contributors. Black opal [Internet]. CAMEO, ; 2022 May 8, 13:46 UTC [cited 2026 Jan 17]. Available from: https://cameo.mfa.org/index.php?title=Black_opal&oldid=85499.

Bluebook style

Black opal, https://cameo.mfa.org/index.php?title=Black_opal&oldid=85499 (last visited January 17, 2026).

BibTeX entry

 @misc{ wiki:xxx,
   author = "CAMEO",
   title = "Black opal --- CAMEO{,} ",
   year = "2022",
   url = "https://cameo.mfa.org/index.php?title=Black_opal&oldid=85499",
   note = "[Online; accessed 17-January-2026]"
 }

When using the LaTeX package url (\usepackage{url} somewhere in the preamble) which tends to give much more nicely formatted web addresses, the following may be preferred: 

 @misc{ wiki:xxx,
   author = "CAMEO",
   title = "Black opal --- CAMEO{,} ",
   year = "2022",
   url = "\url{https://cameo.mfa.org/index.php?title=Black_opal&oldid=85499}",
   note = "[Online; accessed 17-January-2026]"
 }


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