where can i get the emerald stone?

[Precious Garnet]

I can't get it from the moogle in oilvert since I'm on disk 4. Is there anywhere else I can get it?

[Rantz]

Name: Emerald
Info: "Restores HP. It cannot be used in the field. Equip as an Add-on"
Price: N/A
Sell: 1 Gil
Effect:

Restores HP equal to # of Emerald x44
Equip to Eiko to be able to use Emerald Light

Abilities: Haste, MP+10% and White Draw
Used by: Zidane, Steiner, Vivi, Garnet, Amarant, Freya, Quina and Eiko
Location:

Talk to the Cleyran High Priest when as Freya (Disc 2)
Dropped by the Friendly Nymph (Disc 2/3/4)
Buy from Stiltzkin at Oeilvert (Disc 3)

[Shotgunnova]

The nymph is the only way to go on Disc 4, assuming you haven't found 'er yet. She appears in forests in the area around the Iifa Tree (Pualei Plains?).

[Marky Tee]

in the emerald city at the end of the yellow brick road...

[Randgris]

Also at the Healing beach near Cleyra.