Secrets -- (Steven Universe OC Fanfiction)

Black Sapphire knelt next to White Sapphire, shaking ever so slightly in the prescence of her Diamond. She crossed her arms in the Diamond symbol, her gloved hands trembling.
"My Sapphires," White Diamond said, "You are to accompany the next Quartz squadron and help them at the front lines. I assume at least one of you can summon a weapon?"
"Y-yes, my Diamond," Black Sapphire answered, "Both of us can."
"Good," White Diamond nodded her approval, "They are waiting for you."

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Most Gems know of the four Diamonds -- though now there only remain three. But White Diamond (the oldest and most regal of the Diamond Authority) remembers when this was... different. Only she knows of the dark secrets hidden beneath the surface of Homeworld...