…or you can use it to keep metal shards at bay, as your last resort to keep your finger alive. You will claim that endearing vulnerability for four movies. Then for some unfathomable reason you will retcon the arc reactor’s reason for existence, and you will do so in the most hurried way possible. Just… what?! Clearly, this ring is far more beautiful than the highly polished piece of crap that is Iron Man 3.
The arc reactor ring was made by Gino Arizmendi aka Pathetic Peripatetic. Gino was commissioned to make the ring by a fellow geek who had seen his unofficial TARDIS ring. To make the ring pop, Gino set blue topaz and diamond baguettes (Ho ho ho! Un baguette!) in white gold.