Native American Made Inlayed Green Turquoise/Onyx/Opal Sterling Silver Necklace

Beautiful Pendant made of Sterling Silver, Green Turquoise, Black Onyx and Opal. It is Native American, possibly Zuni, Hopi or Navajo. It is signed but I could not identify the maker's mark. The stones are channel set with strips of silver in an abstract pattern. The stone area is then bezel set. There are silver balls attached at the bottom. The pendant is 2" long and .5" wide. It comes with a sterling silver 16" box chain. It weighs 12 grams. It is in excellent condition, there are minor scratches on the back from wear. This was an estate piece. It probably dates from the mid 1990s-2010.