Unknown Gems are Gems who have been visually shown through holograms, drawings, or other methods. They have not been officially identified.
Unknown Gems
"Cheeseburger Backpack"
"Serious Steven"
"Steven the Sword Fighter"
"Sworn to the Sword"
"Attack the Light"
"Keeping it Together"
Historical Friction
This is an unknown gem seen in the play Steven and Jamie put on in "Historical Friction". This gem may be a fusion of Garnet, Amethyst, Pearl, And Rose Seeing that she refers to herself as a "Giant woman" and doesn't appear to resemble any other fusions.