Each piece is handmade and therefore unique. All products are sanded and sealed. This makes it possible for a few air bubbles or bumps to occur, I'll do my best! The products are water and fire resistant. The material is made from a combination of reactive mineral powder and water-based acrylic resin, making it environmentally friendly. It feels like stone, but is lighter and looks very high-quality. It is best to wipe with a damp cloth and do not clean under running water. The products are not dishwasher safe. The material could chip or break if dropped.