The shells found on his bracelet are COWRIES all turned out. It is on a black leather strap and he always wears it when he goes out.
During a chat, Gale Harold said that the significance of the bracelet is that he seduced the characters on The Odyssey and that is how his character got the bracelet. I can't seem to find the original quote cause we all know I'm a spaz.
Anyways, Brian always wears the bracelet on his RIGHT wrist ... in this picture its apparent: