Yes this is a buckle by Lee Yazzie purchased in Colorado 1979 by my father -Mr. Yazzie had won best of show with it that year, just not sure which show - Lone Mountain Turquoise I believe - an incredible piece by an incredible artist -
Photos of Yazzie Buckle/uploads/54.JPG/uploads/55.JPG
That is an amazing piece, don't see Lee Yazzie work all the time.
He only makes a few pieces a year and collectors snatch them up. Quite a treasure.