This ring is a size 7 1/4 (USA). Markings: AR, Arrow symbolAttributed to either Navajo Raymond Armstrong or Ambrose Roanhorse (Tested & guaranteed to be Sterling Silver) This ring weighs 4.6 Grams The Stone/Design is Blue Turquoise Shadowbox Natural, Industry Standard Treatment If Any 7.2×4.6mm The condition of this ring is Estate, Very Good, Slight Patina Stock# R2839Mar.