Board Thread:General Discussion/@comment-12731359-20141014133010/@comment-24986099-20141014143555

Alright, you obviously didn't pay attention during the episode so let me help you.

Lapis Lazuli attacked the Crystal Gems because she though they were going to force her back into the mirror when all she wanted to do was return home. Nobody knows for sure what the Crystal Gems were going to do with Lapis Lazuli if she was defeated by them but they probably would have bubbled her to prevent her from causing more harm harm to Beach City.

Lapis Lazuli say the Crystal Gems as a threat and that is why she attacked them and fled.

She recognizes Steven as a Gem because all Gems can sense other Gems. She also clearly seen he has the ability to heal other Gems.

Yes, Lapis recognized Steven as a Gem and she never stated that he wasn't, she only asked if he was a Crystal Gem because 'Crystal Gems, the' is the title of the team of Gems dedicated to protecting Earth (AKA Garnet, Amethyst, Pearl, and Steven.) She asked if Steven was a member of the team because he freed her, implying that the Crystal Gems are notorious for caring less about their own kind than Humans, as they had deemed themselves the protectors of Humanity.

TL;DR: Lapis seen the Crystal Gems as a threat. Lapis never stated Steven wasn't a gem because she was asking if he was affiliated with a team.