Wow, this one is a show piece, if "The King" were still with us, he would love this belt!  Beautifully cut turquoise possibly royston mine would be my guess.  Five conchas including the buckle measure 6" x 6" and the five butterflys measure 6" long.  The whole belt measure 51" .  Sadly unsigned, but I have an idea who did it..... Possibly Justin Wilson, or Juliana Williams.....  I will update listing as soon as I confirm.