Green vase, snapped pontil

This glass vase is about 8" high x 6" widest diameter and weighs just under 5 lbs. It has a snapped pontil mark and is not signed or marked in any way.

Very inexpensive online auction find in the U.S. When I first saw it, I thought it was a molded Chinese vase but then saw that it has a snapped pontil. I do not recall ever seeing a Chinese vase with a snapped pontil but sure there must be some. It appears to be clear cased glass over a cotton candy textured inner green layer.

Then I wondered how it was made and went down a rabbit hole of trying find something similar but could not. Very odd thick, heavy vase so I impulse purchased so I could get a better look at it. Seller's images which I will replace when it arrives.

I tried Google Images and could find nothing similar. Odd color, odd pattern.... I am stumped. Does anyone recognize this style of vase or have a guess about its origin or how it was made? Guessing it is American studio glass???