Heulandite Subgroup : (Na/Ca/K)5-6[Al8-9 Si27-28 O72]· nH2O
As recorded:
Le Masonade, San Nicolò Valley, San Giovanni di Fassa, Trento Province, Trentino-Alto Adige, Italy
Collected by:
Photo added to mindat.org
“Twisting of red, tabular heulandite crystals to form spherical aggregates. Collection and photo of Gianfranco Ciccolini.”
Gianfranco Ciccolini - 28th November 2017
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