Lapis, thankfully, does stop when she hears Steven's voice. It's not for long though, because she honestly can't fathom why he'd be telling her to stop. Can't he hear the other lapis lazulis in trouble? They need help!

"Steven! You have to help me! I need- I can't find their gems! No matter how many I break there's nothing behind them! They have to be here somewhere! Help me free them!" Panic doesn't even begin to describe the state that Lapis is in mentally at the moment.

This time, Lapis smashes another mirror with her elbow.