517 CTS MOROCCAN CRYSTAL GEODE SPECIMEN MS 304

Description

Geodes are formed as gas bubbles within igneous, volcanic lava or cavities within sedimentary formations.

Crystals slowly grow from minerals which filter into the geode.

Over many years, the lava flow or rock formation weathers away to leave the much more resistant quartz geode

Sahara destert Morocco

Size 60 x 58x 24  mm