Chemical resistance of platinum

How the heck expensive is a platinum ounce?

About $1500 per ounce at the price I found online (as of 7/14/14).

Holy crap...and he oxidized it?

I know it's just a tiny layer of oxidation, but that's an expensive demonstration.

It's not as expensive as the one below, though, in which he dissolves the platinum bar in aqua regia.