This specimen features a number of snow-white, fibrous, spherical "puffs" of okenite planted between a crystal-lined grey basalt matrix. The cavity is quite deep and actually goes all the way through with a couple of small holes on the other side. The vug is lined with a bladed creamy white and semi-translucent yet-to-be-identified zeolite (fairly certain its stilbite) crystals. Often miscategorized as a zeolite, it's actually a silicate, though the mineral usually does occur with zeolites. India produces the biggest and most fine Okenite in the world, no question. A very distinctive mineral!