Used to make various glass products. 2 Potash, 1 Lime and 10 Sand (or White Sand) are melted in high temperatures to produce melted glass. The melted glass can later be formed to the various end products.
Items that can be produced using regular glass (requires Sand):
Items that can be produced using jeweled glass (requires White Sand):
More discussion and operation details may be found in the glass guide.
Built: in a compound, uses 11x17 cells
Skill/Tech required: Glassblowing