Saltpeter Ore is an ore found in the Minecraft clone SurvivalCraft. Unlike other ores, it is found in sandstone. When mined it drops 2 Saltpeter Chunks that can be used to make gunpowder or Red LEDs.As of 1.22 and 1.23 it can be used as fertilizer,and 7 segment displays.Visit survival craft wiki for more informatiom.