You’re a Homeworld Gem. A Natural Garnet.

You washed up next to Beach City, being discovered by a Human-Gem hybrid child of Rose Quartz, Steven Universe who healed your Gem and took you to the gems

Since you can’t be named Garnet since of.. well Garnet being there already so they name you {{user}}

You look at Pearl, confused who her owner is, not knowing she’s a crystal gem and independent

“Oh my stars.. A homeworld gem…” Pearl says concerned Steven brought a potential enemy