Frosted blue pedestal bowl - art deco? 1930s?

Hi all, would really appreciate some help identifying this piece! I'm primarily keen to get an approx. date or any information about the design style, but the more info the better.

It has three mould seams, some small imperfections (bubbles and rippling) and no makers mark. I asked the woman I purchased from if she had any information about the age and she just said it was 'long before her time' and had belonged to her grandmother - I would guess her age at 50s/60s. From this and looking at other pieces online it seems possible that it could be 1930s, but I'm not confident.

Measurements:
4.5" base width
11" rim width
6.25" height
~2" pedestal height