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Paraíba Tourmaline

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Formula:
Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Name:
After the original source - Paraíba, Brazil.
A variety of Cuprian Elbaite

An electrifying blue-to-green coloured, gemmy, variety of cuprian elbaite.

In mineralogical terms, Paraiba Tourmaline should refer only to tourmaline from the original source, Paraíba, Brazil.

However, the name has an extended use through the gem trade to include similar electric-blue tourmalines (where the colour is caused by trace copper) from other sources in Brazil, Mozambique, Nigeria, etc.

Note - some stones, on TV shopping channels for example, have been labelled as Paraíba Tourmaline, but appear on screen to be ordinary green tourmaline. This may simply be a problem with the reproduction of the colour over TV, but buyers should beware, only tourmaline with a genuine electric blue or blue-green colour should with any honesty be called by this name.

For references, see cuprian elbaite.


Visit gemdat.org for gemological information about Paraíba Tourmaline.


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Pronounciation of Paraíba TourmalineHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Chemical Properties of Paraíba TourmalineHide

Formula:
Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)

Other Language Names for Paraíba TourmalineHide

Other InformationHide

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 Paraíba TourmalineHide

Reference List:
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Sugiyama, K., Arima, H., Konno, H., Mikouchi, T. (2017): XAFS study on the location of Cu and Mn in a greenish blue elbaite from Alto dos Quntos [sic] mine, Brazil. Journal of Mineralogical and Petrological Sciences 112, 139-146.

Internet Links for Paraíba TourmalineHide

 
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