Here is something that is simple yet effective, The Minimalist Belt by GROVEMADE. This belt is produce by two things, leather and the metal buckle. The leather is made from vegetable tanned bridle leather and the buckle is made from a single piece of stainless steel. GROVEMADE have decided to take the most minimalist approach when creating this belt, not thread, not stitches nor rivets. It is just a two simple materials. The only thing is that it is made to order. Available now for $99.00.
I am not a fan of the price. The price is not reflective of the materials. I have seen other leather belts that are lower price than this and they have more materials.