Prehnite on Epidote - Holyoke 'traps', USA - 6 cm wide x 3 cm high x 8 cm deep (front to back). Prehnite is 1.5 cm.
Mineral: Prehnite on Epidote
Locality: Holyoke 'traps', Mount Holyoke Range, Hampshire County, Massachusetts, USA
Dimensions: 6 cm wide x 3 cm high x 8 cm deep (front to back). Prehnite is 1.5 cm.