I have a heavy American Indian, sterling bracelet with a green turquoise stone on top. The piece is exceptional & has good beading and stamping. The Hallmark is a large owl stamp on the underside with an N in the top center. The hallmark stamping is as beautiful as the design on the top of the bracelet. The wingspan of the owl is about 2 inches wide. It has big eyes. I need help in identifing the artist. I have looked on line and in the book "Hallmarks of the Southwest", but no luck.

There are some sites with Native American hallmarks
I don't remember them all

Indian Native American hallmarks M Z

Southwestern jewelry handcrafted by Native American Indians.

native american hallmarks - Yahoo! Image Search Results