Iridescent Glass Bowl

I need a little help from my friends:
I have been very busy recently and barely gone hunting for treasures or visited my favorite site - CW!
Today I found the time to look around and located this glass bowl. The bowl is unmarked and has a nice iridescent finish. I cannot find any marks from molds or pontil marks. The bowl is not perfect and could be handmade.

I really don't know what to make of it. On one hand, the glass looks a lot like American glass but on the other hand, it might just be a recent import. I wouldn't be too upset about that because I might pass it on to one of my daughters but I still would like to find out what it is.

Any ideas would be greatly appreciated.

Thanks for looking:)