Hey guys, I'm doing a project on the physical properties and :. uses of diamond. I've got this week to research, and next week I have to create my presentation. I've been looking up all the uses/properties of diamond. I know that: diamond is the hardest natural element this means that diamond can't be scratched by any other natural element apart from itself. And this is why they use diamonds to cut other diamonds when creating "brilliant diamond stones". However, this confuses me: http://en.wikipedia.org/wiki/Diamond_blade I understand the process of how the diamond blade works, but surely, if diamond is so hard, why does it get worn down? ---------- I am also curious to how Diamond polishing paste works? surely a slurry of suspended diamond particles would scratch the surface, as opposed to polish it, due to its hardness. ------ Many Thanks in advance for any help I receive!