Welsh natural slate whetstone: Honing stone/Sharpening stone by Inigo Jones and Co. Traditionally valued by craftsmen for the hardness and close texture of Mica Slate. Use water as a lubricant. This stone has been very well reviewed by straight razor owners. It's a natural stone so can't give an exact grit. It has been compared to an 8k hone.
8" x 2" x ½" / 20cm x 5cm x 1cm
Approx weight: 300 grams