We are so happy to bring to you this handmade Navajo ring with such a stunning stone in this rare turquoise. The Blue Diamond Mine in Nevada produces a hard, dark blue turquoise with black chert matrix . Mined mostly in the 60's & 70's, the mine is now closed so it's very hard to find these days. The band is exquisitely crafted of twisted rope between silver strands. This stone measures 1/2" by 3/8" at the widest point. Hand crafted entirely in sterling silver. Comes with a certificate of Authenticity. Support and enjoy a truly "Made in America" piece of art.