Unglazed tile is tile without any additional coating. It is clay, fired in a kiln, and left its natural color. Unglazed tile is more durable but less resistant to moisture. Because they only come in natural tones, they are also not as versatile for design. Glazed tile, on the other hand, has a non-porous glass coating applied after its initial firing. Upon being fired again, this coating, or glaze, fuses with the tile. Glazed tile works very well in areas of the home where moisture is present, such as kitchens and bathrooms, and offers a wide variety of options for color and pattern that glazed tile cannot.