* Pumice is a type of volcanic rock formed from frothy, gas-rich lava. It's extremely porous and lightweight.

* Geodes are hollow, rock formations with an internal cavity often lined with crystals. They can be found in various types of rock, including volcanic rock, but not specifically in pumice.

Here's why pumice cannot form geodes:

* Pumice is extremely porous. It lacks the solid, closed structure necessary for a cavity to form inside, which is a key characteristic of a geode.

* Pumice is often formed in fast-cooling lava flows. This rapid cooling doesn't allow for the gradual crystal growth and formation of cavities that are necessary for geodes to develop.

Where to find geodes:

* Volcanic areas: Many geodes are found in volcanic regions where lava flows have cooled and solidified.

* Sedimentary rock formations: Geodes can also be found in sedimentary rocks like limestone, sandstone, and shale.

* Rock shops and online retailers: You can purchase geodes from specialized rock shops, museums, or online retailers.

Remember: If you're looking for geodes, you should focus on areas with the right geological conditions, not on areas where pumice is found.