That would do it, he guesses. In terms of something bad enough to make Garnet break up. He just... never really thought to ask for specifics. It seemed unimportant, like something he could deal with later, and the idea of the wedding had been so hopeful...

He rests his hand over his gem, looking stunned. He believes what Amethyst is saying. He believed that Rose would hide something like that, lie about it for thousands of years. He'd just never have imagined that this... his gem... could be a diamond. That it would all be that simple and that complicated. Rose had never killed anyone. Just like he'd hoped. Yet, maybe she had done something worse.

"So, all this time that they've been chasing us... because of what mom did..." he starts, and then immediately trails off. Amethyst already knows what he means. "I'm... like them?"