Okenite Big Puffballs Inside Chalcedony Geode Natural Mineral Specimen # B 5698

Features:

Primary Mineral: Okenite
Secondary Mineral: Chalcedony
Size: 12 x 8 inches (30.5 x 20.3 cm)
Size Class: Museum
Weight: 6,690 g (14.7 lb)
Locality: Mumbai, Maharashtra, India

A massive gray basalt geode from Mumbai, more than 30 cm across, with a creamy white chalcedony lining crowded with soft white okenite puffballs. The back of the geode is open, so light passes into the cavity and the puffballs glow against the darker shell.

Okenite is a calcium silicate, not a zeolite, though it shares the same Deccan basalt cavities. Its extremely fine, flexible fibers grow in soft, cotton-like puffballs, which are best displayed untouched. Mumbai's quarries have long been a classic source of okenite geodes.

At nearly 15 lb, this okenite geode is a museum-sized showpiece.