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Thomsonite-Ca from
Rio Viejo, San Rafael, Alajuela Province, Costa Rica

Formula:NaCa2[Al5Si5O20] · 6H2O
Habit:fan like groups of blades
Validity:Believed Valid
References:Tschernich, R. (1992): Zeolites of the World, p.52,101,323,415,494; Micro Probe Vol 7 No. 7 Spring 1993
Associated Minerals Based on Photo Data:
Mesolite4 photos of Thomsonite-Ca associated with Mesolite at this locality.
Analcime2 photos of Thomsonite-Ca associated with Analcime at this locality.
Stilbite subgroup1 photo of Thomsonite-Ca associated with Stilbite subgroup at this locality.
Calcite1 photo of Thomsonite-Ca associated with Calcite at this locality.
Mineral Data:Click here to view Thomsonite-Ca data
Locality Data:Click here to view Rio Viejo, San Rafael, Alajuela Province, Costa Rica
Mineral and/or Locality  
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