Tungsten is a very dense and therefore heavy metal. Wondering if it was bulletproof tungsten has been put to the test in this informative video. After using several weapons and types of ammo there is now proof. Tungsten in its pure form and a one and a half inch cube was slightly damaged by the shots fired at it. When starting with one thousand and nine grams in the beginning, the same cube was weighed again and the result was still one thousand and nine grams. So, although slightly damaged, the cube did not lose any of its mass unlike the shattered ammo that had struck it.
Read more: Is Tungsten Bulletproof?