The Emerald Valley Turquoise Mine, located in Nevada, produces a very hard and highly sought after deep forest green, along with other shades of green turquoise. The soothing, lighter green in this 3 stone ring is classic Emerald Valley. Hallmarked "F" and "sterling" by Navajo artist Pauline Dolly Foutz. The ring measures 1 & 1/8" by 1/4". Crafted entirely of sterling silver. Comes with a certificate of Authenticity.