It's not her and this is the same shitty mega that was shared on the other forums. Most of what's in there is just what she got away with on instagram. What little there is from her OF has already been shared repeatedly across forums.
Eyes, nose, cheekbones, and mouth are all completely different, plus Amethyst's tits are way perkier than this girl's.
It appears to be from the same set as this one. That's the first time I see the picture you just posted, that makes me wonder if there is an actual complete set.