Geodes and thundereggs

   Just thought I'd share a few of the geodes and thunder eggs we have cut or cracked at our store. People always ask me: What are my favorite rocks? I used to say fossils because they are my first love. However, since owning a rock and fossil shop, I have found I have an appreciation for different rocks in different ways. Geodes And thunder eggs are what I call the fun rocks. For the most part, they are kind of ugly on the outside but amazing on the inside. On our geode display sign It says "Always a surprise inside" 

  Geodes and thunder eggs are volcanic rocks, that start out as a rock bubble with mineral laden moisture trapped ins ide. Over the years, the water escapes through tiny cracks or pores. The minerals that are left, form crystals inside. This process will continue until the moisture runs out, the geode is removed from it's environment, or the geode fills completely. Thunder eggs form pretty much the same way but will have very jagged edges with points called star points. The following pictures show just a small sample of what you can find inside.

Chalcedony geode with smokey druzy quartz. 

Quartz with yellow jasper in the walls. 

Quartz Kentucky geode

Morrocan geode

Banded chalcedony geode wit ha very small druzy quartz opening

Another banded chalcedony with a bigger opening with druzy amethyst. Notice it wants to be a thunder egg. :-)

Another banded chalcedony geode. This one is solid. Those are called nodules. I thought the perfectly circular mineral was amazing. 

Mexican red hot thunder egg.

Utah thunder egg. Note the pointed corners.

Double geode, with a hint of amethyst, from Chihuahua Mexico.

 

Another double amethyst geode from Chihuahua.

 

Finally a single amethyst geode from the same location.

  So as you can see from this small selection, That geodes are indeed a fun and interesting rock.