The bracelet is very pretty but doubtful that is was done by the Zuni artist Henry Yawakia who signed H. B.Y in very fancy capital script (and with zuni) as well. If you google slave bracelets signed HBY you will see alot of hits for an artist called Harry B Yazzie. I am just ballparking value but probably about $200. If it had turquoise in it, then may $300-350. But people who are in the business of valuing will better able to give you a good estimate.