Blown glass hobnail perfume or small decanter... sun purple or flashed?

I would like your opinion on this piece.... is it sun purpled or flashed? Thanks!

 

from that last image of the bottom, I'd say the glass has a applied amethyst stain. Looks to be Duncan & Miller #118 hobnail

 

Hi,
I agree it is "stained" flashed means it was covered with another color glass.
greg

 

thank you!!

 

Sun purpled would be throughout the glass, not only the surface like stain

 

yes that is what I thought, I was told the sun could do that, but that seemed just off to me.

 

The sun reacts with a chemical in the glass, I can't remember which, manganese maybe? Anyway, that's what turns it purple.

 

it's manganese in glass that causes it to 'sun-purple' over an extended time. Sun-purpling is a very light compared to the dark amethyst that is the result of artificial gamma irradiation used in food service to kill microorganisms.