Ingot
Smelted ore. It carries the ore's name and properties into everything made from it.
Most ingots go onto the Anvil to become a Bar, Sheet or Plate. Some recipes take them directly: the Anvil itself (3), Battery, Fuel Rod, Solar Panel, Ember Torch, Insulated Suit and Alloy Plating.
Different metals never stack together, so a pile of ingots stays sorted by ore.