Vintage Antique Glass Green Jadeite Bottle Stopper Fan Design

I believe it to be a perfume applique with the extension missing
Could also be for a decanter
It is exactly as pictured
Measures approx 2" tall by 2" wide
Part that actually fills hole measures approx 3/4" across at widest
Other than spot where I believe an applique was attached, there are no chips, cracks, or repairs
Any questions...PLEASE ask