Made from sprayed glass fibre reinforced concrete and 75% lighter than concrete (easy to move and place) yet strong and durable. This environmentally-friendly material is petrochemical free and 100% recyclable. It is also rust and fire proof. Finishes are hand applied and reactive oxides create coatings that last longer than paint, stains or dyes. Pietro Stoneware is coated with a Pietrophos shield for added product resilience and stability. Marks on pots can be cleaned using mild soapy water with a soft bristle brush or cloth. Harsh chemicals or abrasive cleaning implements should not be used. No two pieces are identical so products have an element of uniqueness.