I had never seen vivianite from New Jersey myself, and was surprised to see this piece (with an accompanying old Italian label) on a table at Munich where an old colelction of US and Mexico locality pieces was being broken up. The specimen has dark green blades in a protected pocket of hard sandstone. Thanks to Jim Chenard for more comments: This location is old, and part may still be accessible, if they have not developed the whole area.The crystals are on the larger side from there, and it is most likely an older piece. See article: Mullica Hill, New Jersey in Min. Rec. 9-10/1980.