This Specimen has been sold.
2" Botryoidal Green Prehnite Formation - Patterson, New Jersey
This is a 2" wide, botryoidal forest green prehnite cluster that was collected from the Lower New Street Quarry in Paterson, New Jersey.
Prehnite is a calcium aluminum silicate with the chemical composition Ca2Al(AlSi3O10)(OH)2. It generally occurs as volcanic cavity infillings, and typically is a shade between yellow and green, however colorless and blue specimens are not unheard of.