Platinum pladdium rhenium ruthenium irdenim ect

[Wonka]

Anyone have experience melting these with a torch? Do they bubble like the ferric metals do when exposed to the atmosphere?

 

[Wonka]

I have a gold colloidal and it’s something with a high melting point that bubbles and turns a brownish color. I’m just trying to figure out if it’s a PGM mixed in.

Edit: with a propane oxygen torch I can just barely get it to start to pool.

Edit:2 the material also does not dissolve in 50/50 nitric acid.