This sterling silver dragonfly pin is Zuni made. It is signed on the back but I do not know who the artist is. The hallmark looks like two waves or two Ms or Ws. It is sterling silver but not marked as such.
 
The dragonfly represents different things in many Native American cultures but some notable ones are health, speed and purity. This pin measures 1.4" long by 1.1" wide. It is inlaid with multi-colored opal.