schist
>>5579645
shale
bumping this mineral formation
>>5579645
Literally poop
>>5579645
limestone
this thread rocks
>>5579795
Gneiss. Really gneiss.
>>5579809
pyrite
the crux of the biscuit
>>5579645
looks like a tasty steak id eat it
>>5579943
same
shizzles 2800