slipstone
/ˈslɪpstəʊn
/noun
A shaped oilstone used to sharpen gouges.Sometimes the name ‘slipstone’ is also used to describe a whetstone....
- Henry Taylor uses one small and one large slipstone for sharpening carving gouges and chisels.
- Sharpen carving knives with a fine-grit slipstone, making circular strokes along the edge at the cutting bevel.