Qualitative XRD analysis led to identifying a variety of zeolite species, including analcime, as the dominant zeolytic phase, followed by chabazite, natrolite, thomsonite, wairakite, stilbite, stilbite-Ca, phillip-site and stellerite-Na, thomsonite-Ca, chabazite-Ca and chabazite-Na, with minor stellerite, laumontite, levyne, phillipsite-Na, and gyrolite
Other secondary minerals associated with zeolites were celadonite (Fe-rich mica), nontronite (Fe-rich smectite), greigeite (iron sulide mineral), koninckite or bobierrite (phosphates), alunite (sulphate), truscottite (silicate), calcite or dolomite, and quartz Nontronite occurred in most samples.
The hollow pieces of gray basalt expertly trimmed into ovoid shapes have openings into interiors lined with drusy quartz or milky white stalactitic prehnite, on which sit okenite puffballs averaging 2 cm; pearly white spheres of gyrolite
accompany the puffballs on a few specimens.
All zeolite minerals previously reported from the North Mountain Basalt, except gyrolite
, levyne, and mordenite, have also been identified along the North Shore of the Minas Basin.