Heulandite Subgroup
Specimen ID: HVY-AV4
Heulandite Subgroup : (Na/Ca/K)5-6[Al8-9 Si27-28 O72]· nH2O
Collected by:
Photo added to mindat.org
“Specimen collected in summer 1980. FOV is about 3.5 cm. Slide scanned with Nikon Coolscan 5000 ED. Collection and photo: S. Giagheddu. ”
Salvatore Giagheddu - 12th March 2012
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