hello everyone, please someone answer

so I started leather crafting and I got how it works, it s pretty good and I like it.
unfortunately the only thing that I got stuck now (@ level 10) beacause I am missing one ingredient which I can t figure out what it is.
is it fire shards? (if so I am screwed because in missions they don't reward me with that stuff anymore) then how many do I need, if that s the case

I just need to know what is the second ingredient to make simple leather
someone help