Hardness
Sheesh! You take arguements to the nutty extreeme, don'tcha?!?
The Mohs scale, IIRC, goes from Chalk to Diamond. You take a piece of material that you want to test, and see if it will "mark" (or leave a scratch on) a piece of chalk... If it does, you proceed UP the scale to the next hader material. When you find something that your test material won't "mark", then you see if that material will mark it.
In this way, you get a "Moh's Number". That number is the material's hardness.
Now in D&D terms, you would have enchanted materials (probably above diamond), and adamanti(ne/te), and then its magical variations.
By using a weight (let's say twenty pounds), you remove variables (how much pressure was applied) from the equation. Nothing there that would break the sword. At worst, there would be another "sharpening scratch" along the edge of the blade. Etching the blade would do more damage than that.
Sheesh! You take arguements to the nutty extreeme, don'tcha?!?

The Mohs scale, IIRC, goes from Chalk to Diamond. You take a piece of material that you want to test, and see if it will "mark" (or leave a scratch on) a piece of chalk... If it does, you proceed UP the scale to the next hader material. When you find something that your test material won't "mark", then you see if that material will mark it.
In this way, you get a "Moh's Number". That number is the material's hardness.
Now in D&D terms, you would have enchanted materials (probably above diamond), and adamanti(ne/te), and then its magical variations.
By using a weight (let's say twenty pounds), you remove variables (how much pressure was applied) from the equation. Nothing there that would break the sword. At worst, there would be another "sharpening scratch" along the edge of the blade. Etching the blade would do more damage than that.