Oval Kingman turquoise adjustable ring. Set in solid sterling silver. The oval stone is set across the ring in a non traditional way. The stone measures 1" x 7/8". Easy to wear on almost any finger due to its adjustable shank. Very unique ring. NAVAJO HANDCRAFTED KNIGMAN ARIZONA RING Kingman Turquoise originates in the Mineral Park Mining District near Kingman, Arizona. One of the largest domestic turquoise mines, it is found in a large open pit copper mine in the high desert country. The Kingman Mine district was first mined by Native Americans; it was part of the most extensive prehistoric workings in Arizona.