原石 [genseki] or 'ore' in Japanese.
Final Fantasy IX

Buy: - (sell: 150 gil)
Steal: Armodullahan, (various enemies)
Treasure: Lindblum theater district studio (disc 1, another on disc 3), Cleyra nearby the inn, Cleyra cathedral main room, Madain Sari Eiko's dining room
Obtain: exchange for 250 Chocobo Hot&Cold points at a Chocobo Forest, capture 2 frogs at Qu's Marsh (combined total for the marshes), dig up during Chocobo Hot & Cold, dig up 27 on the world map with the Chocograph 'Ocean', 17 with 'Forgotten Plains' and 14 with 'Dusk Plains', use Dead Pepper for 9 in Quan's Dwelling fishing spot, Eiko's spell Jewel
Use: Amethyst, Garnet, Lapis Lazuli, Opal, Peridot, Sapphire, Topaz, Tin Ore, give to Mu, give to Ghost, give to Ladybird, give to Yeti, give to Nymph
Description: ?
Pictlogica

Buy: - (sell: ? gil)
Obtain: event quests Treasure Excavation and Rescue the Princess
Use: required for EX Alchemy to create the +1 to +3 versions of Ramuh, Shiva and Ifrit
Type: Alchemy Material, Rarity: ★★★
Description: Material for EX Fusion and EX Alchemy synthesization
Category: Item