Mary do you know if it's Native American Jewelry? Hopi jewelry has beautiful style that can be traced back to silversmiths in the 1800s. Today, Hopi Indian silversmiths are known for an overlay technique and produce some of the most beautiful Hopi jewelry available.
Native American turquoise is among the most popular and this beautiful tone can be found in, Navajo jewelry, Kokopelli jewelry and Hopi jewelry, to name just a few.
There are hundreds of Native American tribes across the country and each have their own style and complexities that really make every piece unique and special in its own way. Not all pieces of Native American jewelry is signed. There is a link to some of the Native American marks in the Jewelry Resources.