Diagram: Yellow meteorite ore is a crafting diagram in The Witcher 2: Assassins of Kings that is needed to craft yellow meteorite ore.
It can be purchased from Berthold Candeleria at the dwarven smithy in Flotsam. Can also be bought in Chapter III from Falas, right outside the place where you go to initiate the dragon fight. Triss would be waiting nearby if you saved her.