Comments

Correct in that tungsten and gold are almost the same density (tungsten: 19250 kg per cubic meter vs gold: 19300 kg per cubic meter). The manufacturing of bars of tungsten just slightly smaller than the standard gold bars mentioned may be a bit of a problem; pure tungsten -- although not very expensive -- is usually available as a powder, and has the highest melting point all all metals, some 3,422 deg. Celsius. Good luck finding any easily available furnaces to even melt this, let alone cast it into custom-made bars. And while the pure metal can be cut with a hacksaw, extruded and otherwise worked, any alloys or impurities make it extremely brittle and difficult.