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Baris 54:
== Lihat pula ==
{{Wikisource|EB1911:Opal}}
* [[Fenomena optik]]
* [[Opalit]]
==
{{Reflist|30em}}
== Pranala luar ==
{{Commons category|Opal}}
* {{en}} [http://www.farlang.com/gemstones/opal Farlang opal Hist. References] Localities, anecdotes by [[Theophrastus]], [[Isaac Newton]], [[Georg Agricola]] etc. * {{en}} [http://gemstone.org/gem-by-gem/english/opal.html ICA's Opal Page]: International Colored Stone Association
{{Perhiasan}}
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