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Pollucite

Pollucite
  • Translations : Pollucit, Pollucita, Поллуцит, 铯沸石, ポルクス石
  • Synonym : Caesium Silicate
  • Etymology : From Greek " Polux ", brother of Beaver, by allusion to the systematic association with Castorite.
  • Discovery: by 1846
  • Type localityLa Speranza (Pisani's Quarry), San Piero in Campo, Campo nell'Elba, Elba Island, Livorno Province, Tuscany, Italy

Gemological data

  • Chemical formula : (Cs,Na)2(Al2Si4O12) · 2H2O
  • Hardness (Mohs) : 6.5 - 7
  • Density : 2.86 - 2.94
  • Refractive index : 1.517 - 1.525
  • Birefingence : 0.014
  • Crystal system : Cubique
  • Group : Zéolites
  • Mineralogical Class : Tectosilicates

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