The Stone Mountain turquoise mine in Northern Nevada is a small mine that produces hard, gem quality turquoise in colors ranging from different shades of green to a medium blue with a light reddish brown matrix to golden brown matrix. This is a lovely, teardrop shaped, solid sterling silver pendant. Hallmarked on the back "R. Tom" and "Sterling" by the Navajo artist. He has done a very detailed job with the sterling silver bezel of twisted rope and cut out work. Pendant and bezel measures 7/8" by 3/4" (NOT including the bail). The 3/8" bail has a 7mm opening. Comes with a certificate of Authenticity.