Zingu Pearl Shell
ジングパールの殻 [zingu pearl no kara] or 'zingu pearl shell' in Japanese.
Grimoire of the Rift

Buy: - (sell: 55 gil)
Use: Pearl Blade, Silver Cannon, Iron Armor
Reward: Throw Down x3 (once)
Type: Bone, Rank: —
Description: Zingu pearls are found in these fua shells. Used in making shell cameos.
Final Fantasy Tactics S

Buy: - (sell: 5 gil)
Use: ?
Obtain: Sacred Ground Luma/Path of Thirst
Description: A common bone
Category: Item