Originally posted by Yogg-Pepe:

I asked them and they didnt had tears in their inv :( i will return and check on the bottom of the cliffs

You also stated that Moder had destroyed rocks, in which case it probably tore chucks out of the terrain too. So, look carefully in any of the holes made in the terrain.
I can understand it being a possible bug if no Tears at all were found, but if you were able to find one, then the rest of them must have dropped too... you just have to find them in time.