Johnson & Held, based in Colorado, hand makes unique sand cast and stones buckles with classic western themes. These are metal framed buckles and they then use various small or crushed colored stones to form the image. It is then covered with a very tough polymer resin that holds it all together.
Ron Heller is the company President and they are based in Colorado. These are very popular buckles and they can make custom ones upon request.
I have several of their buckles for sale at my Beal’s Cowboy Buckles store.