Hang on ill type her backstory later but uh shes apart of my Steven universe Au called "Mistakes Matter".

([My hands were cold and numb while writing this so sorry if there's errors-]) Black Diamond was a diamond much like Pink Diamond. She used to be a small diamond, she loved gardening and she was the worst at lying and keeping secrets. In the end of Era 1, she released the secrets she was told to keep along with the lies she had told, the secrets that were being kept by the Diamonds were extremely conversational, causing thousands of gems to start a rebellion. [continue]

[continuing] This Rebellion was also called the Gem War or The Gem v.s Diamonds War. The leader of this war was an Adamite soldier, Cut-8LT and Facet-1A, the Facet known for making extremely strong soldiers. When the Rebellion finally got the Diamonds out of hiding, they attacked. This brewed into a century long war, causing many generations to be endangered. [continue]

[(Continuing later because I have things to do. Please comment any suggestions I should add to the lore of Black Diamond!)]

WDYM FLASHBACKS

I HAVE NEBVER SEEN THIS WOMAN EVER IN MY LIFE THAT IS TERRIFYINB