- Small Cabinet, 8.3 x 4.5 x 3.3 cm
- St Andreasberg, St Andreasberg District, Harz Mts, Lower Saxony, Germany
A remarkably rich and superb specimen of this rare zeolite group member, hosting hundreds of sharp, highly lustrous crystals. This is the Type Locality for the species, from 1801. Many crystals are cyclic-twinned and the large crystal is 1.0 cm. Classic, older material.