Product Features * Made of natural slate, formed 400 million years ago, a fine-grained rock derived from an original shale-type sedimentary rock comprised of clay or volcanic ash * Since slate is a natural material, each piece will have its own characteristics of color, marks, and lines * Swissmar slate boards provide a unique and handsome presentation for a selection of cheeses, appetizers or bite-sized desserts * Non-porous with a smooth surface and hand-crafted edges * Board is 40 x 25 x 0.5 cm / 16 x 10 x 0.25 in * Non-skid felt pads on the bottom protect surfaces Care & Cleaning * Can be cleaned with olive oil, which will darken it, or with a cloth and warm water, dry thoroughly * Do not use abrasive cleansers, vinegar, or lemon-based cleansers * Not dishwasher safe