exchangeRates

{
  lapis = 1,
  diamond = 65,
  lead = 0.1,
  copper = 0.04,
  quartz = 3,
  tin = 0.1,
  coal = 2,
  nickel = 0.6,
  redstone = 12,
  gold = 40,
  silver = 0.15,
  platinum = 0.8,
  iron = 4,
}