this looks okay nothing really hard. It's not a problem to achieve something like that( I just read the previous comment) for an experienced hand. Probably a bit edited on contrast cuz the graphite usually shines more. Great gallery, my fav it's 'rancore'
This "drawing" was obviously edited on the computer. For example the background was blurred and several sections of the glass were blurred as well. It's impossible to achieve that smooth of a texture with graphite.