a beginner needing help

[rustedhaze]

i live in east tennessee and am a beginning rock hound,i have been looking for geodes but everytime i think ive found one its just mud,but usually with a rock in the center.these are a couple of rocks i really need help identifing.

 

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[Erving]

You would probably get more responces if you post this in the Rock/Gems Forum.