
1) Metalworking cutting tool
Found on
https://www.crosswordclues.com/clue/diamond-tool

A diamond tool is a cutting tool with diamond grains fixed on the functional parts of the tool via a bonding material or another method. As diamond is a superhard material, diamond tools have many advantages as compared with tools made with common abrasives such as corundum and silicon carbide. ==History== In Natural History, Pliny wrote `When an....
Found on
http://en.wikipedia.org/wiki/Diamond_tool
No exact match found.