x 40 x 16 mm
prehnite appears to be without damage, while there is some damage to the quartz and calcite
crystals, and to the edges of the specimen. There are a few pressure
and contact marks to some of the quartz and calcite crystals.
Composition: Ca2Al2Si3O10(OH)2 (prehnite)
Specimen Code: NBB 098
US $ 35.