Yellow Diamond

"Yellow Diamond" is a Gem who was first mentioned by Jasper in "The Return."

Jasper and Peridot
Yellow Diamond seems to hold some sort of authority, as Jasper and Peridot needed to report to them.

Trivia

 * Yellow Diamond is possibly an authoritative figure to some Homeworld Gems, including Jasper and Peridot.
 * Both Peridot and Jasper have a yellow diamond on their chests and other areas of their uniforms, suggesting they are affiliated with Yellow Diamond.
 * The green "hand pedestal" in the Kindergarten control room in "Marble Madness" bears the yellow diamond emblem on it; much like identical pink "hand pedestal" in Rose's Armory bears her rose emblem.Diamond_Authority2.png
 * In "Jail Break," there is a yellow diamond symbol on the floor where Garnet and Jasper fight in addition to a white and blue diamond symbols. Together, the three symbols form a triangle.
 * This may suggest that Yellow Diamond is not the only authority figure of the Gem Homeworld.
 * This would fall in line with Ronaldo's possibly-prophetic ramblings about a "Great Diamond Authority" -- the Diamonds are a ruling class/caste on Homeworld.
 * This is also supported by the fact that Lapis Lazuli has a blue diamond on her outfit, rather than a yellow one.
 * It's possible that Yellow Diamond is a feared Gem, considering Peridot's and Lapis's reaction to Jasper mentioning her.

Gemology
Learn about the diamond gemstone here. To learn about the metaphysical properties of yellow diamond, click here.