- type: material
  id: steel
  name: Steel
  color: gray
  density: 7700
  electricresistivity: 6.9e-7
  thermalconductivity: 18
  specificheat: 500

- type: material
  id: glass
  name: Glass
  color: '#e8f0ff33'
  density: 2500
  electricresistivity: 1.0e+13
  thermalconductivity: 0.9
  specificheat: 840