For polishing, rough stone, finishing, natural whetstone. This is a rough stone. Processing is required for use. I don't think there are any blemishes or streaks, but it's not completely perfect. Maximum dimensions: 15 cm, 13 cm, thickness 4 cm, approximately 1.5 kilograms. The size is not exact. - Shape: Natural stone shape - Rough stone - Application: Natural whetstone for polishing Thank you for viewing.