i dont know exactly but my aunty brought this ring for me in 2010 from israel from that time to now it is same to same no changes and special thing about this ring is when ever i have put this in my finger i have feeled something special , i dont have any other details about this ring i have searched it on Google not single piece is found on internet which make this very special and single in world and inside it there is dirt dont know maybe from very 18 century it can be . maybe if you intrested then you can buy it , its upon you . it is with me from more then 15+ years