The abrasive-resistant glazes are fired at such high temperatures that the clay and glaze form an impenetrable bond making each piece extremely durable. Each piece of Earthborn pottery is organic in design and the edges will vary from piece to piece. No two are exactly alike and that’s what makes them beautiful. All Earthborn products resist chipping and breaking and are certified microwave, oven (when brought up to temperature) and dishwasher safe. Our bowls come in all of the available glaze colors, which may vary slightly.