User blog comment:IamJakuhoRaikoben/Chapter 473: Red Lightning, Review./@comment-1776824-20160215141101/@comment-24800928-20160215165101

errr Moh's hardness scale refers to hardness as in scratch resistance. https://en.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness

The ability to absorb energy and not break or fracture is toughness. Diamonds are actually not that strong when it comes to toughness and can shatter somewhat easily.Now compared to everyday glass diamonds are still usually tougher i think. https://en.wikipedia.org/wiki/Toughness

I just had to add that little tidbit in there cuz people get that mixed up.