After doing a quest turn in with the Skeletal cook at the top of Kurn's the "Thick-boned Skeleton" spawned very shortly thereafter in his corner location. Dropped the "An emerald".
This skeleton also drop the gem A Saphire. the emerald when identified by a necromancer says it is called "The gardens of Sebillis" the Saphire identifies as "The pools of Sebillis" Dont know if this helps or not but there it is..
Seaslax Shadowslinger 31st season necro of the iksar bloodline Elite Guardians of Norrath