Grindstone (GregTech 6)
- This page is about the Grindstone added by GregTech 6. For other uses, see .
The Grindstone is a block added by GregTech 6, used to perform Sharpener recipes by hand. To use the Sharpener, a Sandstone block must first be placed inside the Sharpener, and will need to be replaced every so often. Then, while holding the item to be sharpened in their hand, the player should right click the sharpener until the item is sharpened.