"I have a piece of Native American jewelry that is stamped (.925 silver & .585 gold) and is hallmarked with a Zia design (symbol on the New Mexico state flag) followed by the capitol letter (A) with the words (Made in USA) stamped on the back. From what I understand he was the only Indian silversmith to put Made in USA on his work... I would like to find his name and maybe which tribe? Thank you.."