Prehnite Polished Crystal Tumblestones

Though not a zeolite, prehnite is found associated with minerals such as datolite, calcite, apophyllite, stilbite, laumontite, and heulandite in veins and cavities of basaltic rocks, sometimes in granites, syenites, or gneisses. 

Dimensions: Medium: 2cm - 2.5cm Large: 2.5cm - 3.5cm

Crystals are a natural product and may come with small imperfections.