Grey Stripe Turquoise Pendant

This pendant is handmade one of a kind using Navajo made stamps and mounted on a sterling silver 18 inch chain. It is approximately 1.5 by 1.25 overall dimension and 1by 7/8 inch turquoise.  This piece was an unmarked estate buy from a 90 yr old silversmith but it turned out to be natural hard turquoise which is uncommon nowadays.  Best guess is it is from the Nevada area based on the dark matrix.