This piece uses turquoise from the Indian Mountain mine in Nevada. The pale blue color and black matrix create a very beautiful work. It has an "R" hallmark (stamp) and a "sterling" stamp. (The stamp looks faint and like a "P", but it is an "R".) Generally, Navajo jewelry is stamped with "sterling" instead of "925". Including the top bail, it is approximately 36mm, a design that gives a sense of presence and luxury. Recommended for those who want authenticity or are looking for a natural stone pendant in Indian jewelry. Please check the images and consider it. There are no noticeable scratches, and I think it is in very good condition. INDIAN JEWELRY NAVAJO Indian Mountain NEVADA "R" stamp