Goblet or chalice

[BountyHuntr]

Anyone know what this is or its origins? It appears to be cast iron and has remnants of gold in the crevices. The base unscrews and has a rudimentary thread. There are no discernible casting or makers marks that I can find. Found in the surf sand on the Oregon coast many years ago as told to my mother by my grandmother. My mother inherited this in the estate and promptly asked me to dispose of this "demonic" ritual item as she called it.

 

[nhbenz]

You'd mentioned that the base unscrews, maybe seeing the threads would help in judging the age? That is, if the threads were of a pitch used today, that would tell us something I suppose. I sure have never seen anything like it!