From the Supersmith shop:

In the world of Native American jewelry, the Supersmith Shop was the originator of a complete line of repeatable designs that could be customized with a large selection of stone combinations.

They employ Native American artisans to execute the various designs.  The silver work is cast by means of the lost wax method.  The inlay is hand-done and the appearance of each piece will be different based upon the imagination of the individual jeweler doing the work and the stones with which they work.. 

Gorgeous colors in this little horse. Original receipt from 2022 for $438.00