Amazing Old Primitive Wooden Grater with Embedded Rock Shards interior Overall dimensions: 5 1/2" wide

Overall dimensions: 5 1/2" wide x 6 7/8" tall

6" tall and in very good condition

Overall size is 5 7/8" x 6"

There is a bit of writing on the plastic over the interior flaps of the cover as documented

which once belonged to the Reading Lab at Illinois State University

Amazing Old Primitive Wooden Grater with Embedded Rock Shards interior Overall dimensions: 5 1/2" wideThis I believe is one of the most amazing things I've ever found, which I'd be inclined to call a "made do" creation, though one which must have required a great deal of work to make do. Perhaps it was first made as a cutting board, I'm not sure, but hundreds of tiny chips of rock (looking rather like teeth, and gathered from where I am not sure, perhaps remnants of some sort of chiseling or chipping process?) were painstakingly embedded into it