Vintage Ice Blue Carnival Glass Leaves & Berries Design Mystery Piece

I found this piece several years ago. I have been searching for the name of the pattern and the maker. It is a shallow bowl, kind of like a pie dish. The sides on the inner part have two lines paired together, about an inch apart, all the way around. The bottom has large leaves with a very thick overlapping stem. There are also little berry shapes. This dish is an iridescent ice blue color. It does have a small amount of white residue...maybe from being washed in hard water one to many times. It is still so lovely. I am also wondering if it is a piece from the 1920's or the 1960's. Thank you for looking!