Can you sharpen a knife on piece of marble?

While it might be possible to sharp a knife on marble with careful work and technique. However, it's not a common or recommended method for sharpening knives, as there are more suitable and effective sharpening tools and materials.

Marble, being a relatively soft material compared to knife blades, may not always provide the desired sharpness or optimal edge. Using inappropriate materials for knife sharpening can damage or dull the knife, requiring more effort and resources to restore the blade's cutting edge.

For proper and efficient knife sharpening, it's advisable to use sharpening stones, whetstones, or other specifically designed sharpening tools that can provide the appropriate abrasive surface and maintain the correct blade geometry. These tools come in different grits and are intended to cater to various stages of sharpening, from coarse grinding to fine honing, ensuring a sharp and effective cutting edge.