Natural materials are often the most expensive ones. However, there are more reasons than not to use natural materials. Yes they cost more than synthetic, but they are usually more durable. Not only do they last longer, but they age more gracefully. Natural wood can be re-stained and refinished several times. Stone can be cut, re-used, and polished to make a new design. Not to say that synthetic materials shouldn’t be used or that they can’t be as durable, but natural materials are definitely the best choice long-term. If you want to create a peaceful space with little to no issues long-term, I highly recommend natural materials.