The Turquoise Mountain Mine is located near the Kingman mine in Northwestern Arizona and has been closed since the 1980's. The stone varies from light to high blue or blue-green with gold or brown matrix. This is a stunning, high blue stone with deep brown matrix. The triangle shaped stone is surrounded by a sterling silver bezel of rope and cut out work on each side. Hallmarked "KY" and ".925" on the back by Navajo artist Kathy Yazzie. Crafted entirely of sterling silver. THE 18" STERLING SILVER CHAIN IS INCLUDED! Pendant and bezel measures 3/4" (NOT including the bail) by 5/8" at the widest point. The 1/4" bail has a 4mm opening. The white spot on the stone is a reflection of the camera flash.