White minerals, can be used in fertilizer as well as making gunpowder.
Nitre is produced by a Nitra Tree, the seed for which can be bought from Nora at the Church Market in the middle of Peach Plaza on Thursday or at the Church of the Light store inside of the church. It can also be Quarried from the big stones at the edge of the collapsed wasteland's lake.
Data taken from game assets, game version 1.0. Listed values are without The Giver skill, which gives an extra 1-2 points.
All other characters will default to Neutral (+1).