Apophyllite Group : AB4[Si8O22]X · 8H2O
Stilbite Subgroup : M6-7[Al8-9Si27-28O72]·nH2O
Mindat locality:
Photo added to mindat.org
“Green apophyllite crystals up to 21 mm. with white stilbite crystals up to 10 mm.
Photo and collection A.Tagliaferri”
Alessandro Tagliaferri - 24th June 2018
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