Fortunately, you seem to have gotten lucky in any case. But for the record, hardness and toughness are two different things. While a diamond is great if you want to scratch something, when it comes to smashing something they’re not exactly the best.

Fortunately, pressure or something must have saved you here. (Focusing force on a small point is great for breaking things) but next time you need to break something in order to survive, maybe spring for something else.