POkemon item?

Question

in pearl i was digging and then a saw some like grey rock it had two doys on it and a huge crack but i couldnt get it because the wall collapsed wat is it

Answer 1

Its an Odd Keystone that you put in the tower with the hole in it south of Soleceon Town

Answer 2

i could be the odd keystone or a fossil.

Answer 3

on diamond there is a gray stone and its something like a damp rock or something. sorry i couldnt help that much.

Answer 4

That was probobly a fossel. If you got it, you could have taken it to a building and got it restored into an ancient pokemon.