Found an interesting piece of glass. Can anyone ID?

[Evolution]

I found this today at an old site. Solid piece of glass. Looks like a glass stopper that you would cap a liquor bottle with. That's my best guess. Any other ideas?

 

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[Gypsy Heart]

I think you nailed it ...decanter stopper

 

[UnEarthed72]

I agree a decanter stopper of some sort

 

[MEinWV]

Could be part of a stopper, or even a knob that has broken off a bigger object like a lid/cover.

 

[DanB]

crystal liquor bottle stopper / topper.... nice find

db