12.25" Cased Art Glass Bowl. Blue swirls & raised surface air bubble lines

I hope that someone has more info ton this 12.25" Cased Art Glass Bowl. It has blue swirls & raised surface air bubble lines inside the bowl that are quite rough although not broken. The bottom has  been ground, but not polished. I cannot find a signature. Thank you very much in advance!

Hello, sorry I don't know the maker but it might help your search to know this isn't cased glass. Cased glass is typically two or more layers of block colour fused together so that one encases the other.

Hi. Thank you for your reply. I am confused about how to describe this glass as it has a thick clear inner layer with a thin swirling blue lines layer on the outside. Please advise me as to how you describe this glass. Regards from New Mexico.

From what I can see in the photos I would just describe it as an art glass bowl, clear with blue and green swirls. I don't see layers as you would see in cased glass, only colouring included in the clear glass.