Prehnite

Radau Valley, Bad Harzburg, Goslar District, Harz, Lower Saxony/Niedersachsen  Germany

Specimen size: 6 × 4.2 × 2 cm = 2.36” × 1.65” × 0.79”
Main crystal size: 0.3 × 0.2 cm = 0.12” × 0.08”