Wow, that one comic was right. They do fight Malachite on a beach. The only difference is that it's Alexandrite instead of Sugilite.

Also Malachite must be as powerful as we all though considering they had to bust out Alexandrite to even stand half a chance against her. And even then they just barely won. Thank god for those brave watermelons.

Likely with Peridot since Pearl as a strict no getting in the way when two giant women rumble rule or something.