Ordinary Pebble (Gol Osigr)

This Ordinary Pebble is at found in a cave underneath Arom's Stand and Gol Osigr in Drustvar. It is part of the Riddle of Baa'l.

The entrance is found behind a waterfall in Drustvar. At is the first of a long chain of waterfalls. Get to the landing of that very first waterfall (don't go all the way down!) and enter the cave through the left-hand side of the waterfall. At the back of the cave is an effigy left left behind by the Heartsbane Coven, and the pebble is in the left eye socket of that effigy (or to the right as players are looking at it).

Solution
... Next pebble is found in a cave in Vol'dun.