Stilbite-Ca and Heulandite

This specimen is a pristine cluster of pure-white Stilbite-Ca crystals in the classic wheat-sheaf formation, up to 45 mm long. The crystal surfaces are exceptionally lustrous and clean. The cluster sits upon a layer of white zeolite material, which is likely a mix of Heulandite and Mordenite. All three minerals lie on a matrix of grey-brown basalt rock, itself permeated with white zeolite inclusions. A very aesthetic display specimen.