This is a solid black stone with almost no pattern visible. Due to its thickness, it should retain its coolness for a longer period. The cork sheet on the back is chipped from the time of purchase. ・Stone Type: Natural Granite (Black) ・Surface and Sides: Rustenburg polished finish (Rustenburg finish is a polishing method that brings out a deeper black color) ・Back: Fully covered with cork ・Rounded corners ・Size: 30cm (length) x 45cm (width) / 2.3cm (thickness) (Slight variations may occur as these are visual measurements) ・Weight: Approximately 5kg