Heulandite Subgroup, Prehnite

Specimen ID: GKV-DFM

Mineral(s)
Heulandite Subgroup : (Na/Ca/K)5-6[Al8-9 Si27-28 O72]· nH2O
Prehnite : Ca2Al2Si3O10(OH)2
Locality
Mindat locality:
Events

Photo added to mindat.org

Heulandites sprinkled on knobs of yellowish prehnite, which grew over quartz crystal cores. Specimen about 3" across.
Paul Gilmore - 17th March 2006
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