Vintage Neyshabur Persian Turquoise Silver Ring

This stone is MASSIVE and stunning. The stone in this ring is encased in sterling silver with a sterling silver band.  The stone size is 1.25" x 1" wide.  It is truly a statement ring made from the best Neyshabur Persian Turquoise IR-1.  Purchased from a private estate in Palm Beach, Florida in a lot of Navajo and Old Pawn jewelry.  Not sure exact date but it came into the seller's possession prior to 1984.