A model of a Beskar Ingot from Star Wars. I'd recommend printing it in silver and then painting the details with black acrylic paint.

I printed the ingot in one piece without supports. To get a better surface on the bottom, it can be printed in two halves and then glued together. I've added holes for 1.75mm and 3mm filament pieces for alignment.

The ingot is 50x90mm.