Paraíba Tourmaline

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

Where it forms, where it's found

2recorded occurrences
Source · OpenStreetMap

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
8OOxygenOxygen3115.999495.969
52.95%
13AlAluminiumAluminium7.526.982202.365
21.60%
14SiSiliconSilicon628.085168.510
17.99%
5BBoronBoron310.81032.430
3.46%
11NaSodiumSodium122.99022.990
2.46%
3LiLithiumLithium1.56.94010.410
1.11%
1HHydrogenHydrogen41.0084.032
0.43%
Total936.706100.00%

Mass share = atoms × atomic mass ÷ molar mass × 100

From Mindat formula

Synonyms

  • Paraíba-Turmalin

Literature, links & citation

Citations
  1. 2001Shigley, James E., Cook, Brian C., Laurs, Brendan M., Bernardes, Marcelo de Oliveira (2001) An Update on "Paraíba" Tourmaline from Brazil. Gems & Gemology, 37 (4) 260-276 doi:10.5741/gems.37.4.260DOI: 10.5741/gems.37.4.260
  2. 2007Krzemnicki, M.S. (2007) “Paraiba” tourmalines from Brazil and Africa - Origin determination based on LA-ICP-MS analysis of trace elements. Facette 14, 8
  3. 2017SUGIYAMA, Kazumasa, ARIMA, Hiroshi, KONNO, Hayato, MIKOUCHI, Takashi (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 (4). 139-146 doi:10.2465/jmps.161011 DOI: 10.2465/jmps.161011
  4. 2019Wang, H. A. O. (2019) Paraiba Research Update: an Elemental Analysis of Paraiba Tourmalines from Brazil. Facette 25, 30-31
  5. 2019Katsurada, Yusuke; Sun, Ziyin; Breeding, Christopher M.; Dutrow, Barbara L. (2019) Geographic Origin Determination of Paraiba Tourmaline. Gems & Gemology, 55 (4). 648-659 doi:10.5741/gems.55.4.648 DOI: 10.5741/gems.55.4.648
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Paraíba Tourmaline — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/paraiba-tourmaline-29238},
  note      = {Accessed 2026-05-11}
}