Package: Geodes Library
It has no default dependency. I recommend you set your geodes to generate in mapgen_stone so you can take advantage of this mod further.
I used it to generate 29 geode types at once, and thanks to a new feature you can set them to generate less frequently. backdaniel and I worked together to fix that.
You can occasionally get split open geodes if a side generates in air, another nice feature. You get lots of control over the geodes from setting up budding blocks to making more than 3 layers.
The only thing I could think of that could make it any better is non-spereical geodes and the ability to set the interior node to something other than air.
New rating is 10/10 after the fix for frequency.