Board Thread:General Discussion/@comment-25839649-20150226145743/@comment-24917712-20150226161452

She decided not to tell him she was pregnant?

I think you're missing a few points:

Garnet is more than likely a fusion

Pearl said that had found it, and that it contained Gem History

It's more than likely, the Gems were supposed to hollow out the earth, they were the first to go to it and discovered the beauty and decided not to harm it. I'll link you my theory if you want.