|This article is about the current version of DF.|
Saltpeter is a non-economic and low-value yellow stone found within sedimentary layers. With a melting point of and a boiling point of only , it is one of the few stones which will boil in magma. Saltpeter is also the second least dense non-economic stone, second to jet, making it great for objects that must be hauled frequently, if it were not for its rarity.
In real life, it is used in conjunction with charcoal and sulfur in order to make gunpowder. This process does not exist in Dwarf Fortress (yet; it seems Toady has plans to include gunpowder later, but only for simple uses), and therefore gunpowder is also non-existent.
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It is rumored that if a dwarf ever discovers saltpeter's capabilities, dwarven "civilization" would come to an explosive, but Fun end.
potassium nitrate, good for fertilizer and blowing things up with carbon and sulfur [INORGANIC:SALTPETER] [USE_MATERIAL_TEMPLATE:STONE_TEMPLATE] [STATE_NAME_ADJ:ALL_SOLID:saltpeter][DISPLAY_COLOR:6:7:1][TILE:'x'] [ENVIRONMENT:SEDIMENTARY:CLUSTER_SMALL:100] [SOLID_DENSITY:2105] Previous value was much too low [IS_STONE] [MELTING_POINT:10601] [BOILING_POINT:10720]