Lead, could be the answer, as it is a soft metal that is known to be poisonous.
leadPewter used to contain lead making it heavy.
Soft metal is more like just soft rock but heavy metal is like scremos and other REALLY HEAVY metal and black metal is REALLY REALLY HEAVY like they use death guturals and they are the hardest to...
Make heavy some are not do you think iPod Touch? Hmmm Comment Subribe I don't know and that's what there made of Right?
The majority of limestone is composed of different compounds of Calcium Carbonate, so Calcium is the metallic bugger you are looking for!
A few are lead, tin, zinc and the liquid metal, mercury.