Natural Green And Blue Royston Turquoise Vintage Navajo Silver Ring OldUp for sale is this wonderful vintage Navajo silver ring. Two Royston turquoise stones are set at the north and south ends of this round face ring, with silver rope borders at the sides. It has a double rail band with a silver round ball at each of the ends touching the face of the ring. The dual rails join together at the sides, continuing as a single band to the back. The stones measure around 5 16" x 1 4". The ring face measures around 3 4" x 5 8".