Materials and Metals

Mined from the earth:
Slagnesium, AA Crystal , Silver, Iron, Marble
  Gardenia Springs: Marble, Slag
Devil's Den: Iron (primarily), (formerly silver), sometimes AACrystal or Slag
Slag Point: Slag (Primarily), Silver, sometimes iron
  mined from skybergs:
Aether, Gold, AAcrystal
  Mined for its utility:
(^) Aether (lightweight)
(v) Slagnesium (gives off heat when ignited/struck)
(^/v) AACrystal (allows for the storing of energy/magic)
  need something for currency:
(v) silver
  need multiple for construction:
(v) Iron - hard/strong:
(^) Gold - lightweight; rare/valuable because of that. not used for currency. used in magic circuitry as a conductor.
  alloy - "Membral" (rubbermetal): gold+silver
alloy - "Darksteel" (construction steel/structure): iron + sludge (slagnesium byproduct)
alloy - "Brightsteel" (lightweight armor): gold + iron