I am Geek. There is no question about that. But I am not nearly as Geek as I could be. In case you need any proof of that…
I did not have a Klingon wedding.

I did not have a renaissance wedding.

And I do not own a 20-sided die, much less one on a ring.
You can click on the D20 ring image, if you feel you must own one for yourself. They also sell a D12 if your hands are too dainty for the D20 (which, if you think you need one, is probably true).