A stunning light shade and it's a larger one it really will make a statement in any room it is placed in. The color of the glass from the 1920’s-30’s sometimes called Moonstone is a translucent white not milk glass.
This must have come out of a grand room. It's really a piece from the past right at 100 years old I think. There are white specks inside at first I thought it was paint splattered on it. I see one small burst bubble in the last photo. It on the top side can't see it hanging very minor and couple chips to the fitters edge against minor wear and tear.
It's not a common shape. I've not been able to find another one. It fits on a 6” fitter ring and hangs down approx. 12” from ceiling 16” wide.