The Shatterer (Genderbend Steven Universe x male! gem reader)

There is an old tale among gems, of a precious blue Sapphire made to see into the future, accidentally committing a crime by shattering his own diamond(purple Diamond). But from the accident the Sapphire got another form meant for fighting, White Sapphire(Nickname is cross and you'll see why in the first chapter), he can only go into that form when he is angry or fighting(of course being able to turn back into a blue Sapphire when he's calm and not fighting.). He then got a weird feeling to shatter other diamonds.

He managed to escape on a ship with his friend Peridot(not our short, loveable peridot), which Sapphire, aka you, nicknamed him Dot. The two traveled to different colonies, you shatter diamonds while Dot steals different Diamonds' ships(If it has better tech). Stolen Black Spinel(nicknamed Mime) who was abandoned by Black Diamond and peach pearl (peach for a nickname) who don't have a diamond.

You were called Shatterer by other gems, Diamonds were scared of you which made you and your friends happy. Until you meet Steven Universe.