This inlaid Rainbow Dancer pin dates from ca. the 2nd quarter of the 20th century. It may have originated in one of the workshops (such as Maisel) which employed Native American artists to create jewelry for the Fred Harvey Company stores and other outlets.
1 1/8 inches high x 3/4 inches wide
Pin is not marked, but it tests at least .800 or as high as .925 silver content.