From Dungeons of Dredmor Wiki

It's white, dry, and doesn't taste very interesting. It's chalk.

Worth 15 zorkmids. B:24 S:9 B:31 S:6 B:36 S:3

[edit] Crafting

It can be crafted with the following recipe:

It can be used to create Aqua Fortis, Steel Ingot.

[edit] Trivia

• In the game XML files, under the recipe for grinding chalk out of black pearls, there is a comment line that says, "you're welcome."