Yes it would but finding that kind of density in a weight is tough when it needs to be discreet.
from Wiki
The key to this question is the
heaviest metal ON
EARTH. I intrepret that to mean naturally occuring metal. The heaviest metal found on earth naturally (not prodeced in a lab) is
plutonium with an atomic weight of 244. Uranium's is 238. Lead is 207. Osmium is 190. Gold is 196. Mercury is 200. No other metal which occurs in nature has a higher atomic weight than plutonium.
I have a ton of lead but I can't use that. Plutonium and Uranium would be kind of difficult to get
Mercury is liquid at room temperature so this would be pretty messy. It looks like gold is the best option but for a weight that weighs 15 pounds, by todays prices, the weight would cost about $350,000
Maybe I can get my hands on some Osmium