Private collection,This was purchased in the 80s.I have other Sugilite jewelry on E-bay,please look.This silver work is amazing on this ring.The stone unique.Mr. Dan Nieto in my opinion was one of the best.His work is amazing.He seemed to have many sides to his talent,one of a kind type work.He has passed,and we have lost another of 1 of the greats.Thanks for reading