Metallic blue runoff in dab nail from rosin?

[TerpiestToker420]

So made some rosin and I'm getting a blue residue in my titanium nail when I take a dab what could this be from i know the rosin is clean and chemical free could thia be from my nail?

 

[JSH1973]

I think titanium can turn blue with high heat, I've seen it on motorcycle exhausts.
Obviously can't say that's it in your case

 

[Habosabin]

I think titanium can turn blue with high heat, I've seen it on motorcycle exhausts.
Obviously can't say that's it in your case

Titanium nails do turn blue with enough heat. I have one that's blue.