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Virgin Valley District, Humboldt Co., Nevada, USA
© 2001 John H. Betts
Classification of Black Opal | ||||
| mindat.org URL: | http://www.mindat.org/min-7998.html Please feel free to link to this page. | |||
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Other Names for Black Opal | ||||
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Other Information | ||||
| Health Warning: | No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care. | |||
References for Black Opal | ||||
| Reference List: - + | Jones, J.B. and E.R. Segnit (1971), The nature of opal. I Nomenclature and constituent phases. Journal of the Geological Society of Australia: 18: 57-68. Anal. Chem. Acta (1994): 286: 107. Lapis Extra No. 10, Opal (1996). | |||
Internet Links for Black Opal | ||||
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| Specimens: | The following Black Opal specimens are currently listed for sale on minfind.com. | |||
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Localities for Black Opal | ||||
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The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the
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