Sorry for the occasional typo's as I am on my mobile phone.
A great place to start a google search for Pollucite Gems is the International Gemstone Society or (IGS).
Where I found this.
" Not only is gem-quality pollucite very rare, it's also the only mineral which has CAESIUM (Cs) as an essential constituant."
"Pollucite belongs to the zeolite mineral group. It forms a solid solution series, as the Caesium analogue, with analcime, the SODIUM analogue."
Pollucite, SODIUM,
Get it?
Cheers
PIO Price at posting:
1.7¢ Sentiment: Buy Disclosure: Held