Tungsten or Osmium rimmed yoyo?

[yomega_fan_335 (The Yo mast3r)]

@Gambit

Osmium is WAY too expensive.

Compare 1 troy ounce (~31g) of pure silver at $17.95
Buy Ultra High Purity Silver Metal Rounds at RWMM

With 1 troy ounch of Osmium (which is like, just over a centimeter cubed of the stuff) at $939.00.
Buy Osmium Metal | High Purity Osmium for Sale – RWMM

Putting aside the fact that I don’t have any idea of how (or even if) Osmium can be machined, once you’ve taken into account the amount needed and labour costs and what not, you’d end up with like a $20,000 yoyo or something. 

It would mean one heck of a project. Does platinum cost less? What about tungsten?