|“||She was SHATTERED by a Rose Quartz! The entire cut of gem deserves the same fate!||„|
| ~ Yellow Diamond explaining to Blue Diamond that Pink Diamond was shattered by a Rose Quartz and that therefore all of the other Rose Quartzes should be shattered.
Yellow Diamond is one of the main antagonists of the Cartoon Network series Steven Universe alongside Blue Diamond. She is one of the Matriarchs of the Gem Homeworld and a member of The Great Diamond Authority.
She is voiced by Patti LuPone.
Yellow Diamond, as one of the rulers of Homeworld, is of a massive size, her height making a common pearl's pale in comparison. She has a pointed, upturned nose, plump lips and an unusually long neck. She wears a yellow helmet, with two spiked tips. It is unknown what is under her helmet. She has black eyebrows, and black markings around both her eyes, which are bright yellow with diamond shaped pupils. She wears a black and olive bodysuit similar to the ones worn by Jasper, Peridot and Garnet, as well as a yellow coat with very large shoulder pads and a cutout for her gemstone. She also wears gloves of a slightly darker yellow and very dark olive yellow boots.
The long coattail seen in her episode debut was changed to just only a short one in the episode "That Will Be All".
Yellow Diamond, like most Homeworld Gems, is shown to care little for the Earth and organic life. As shown in her debut, she is cold, ruthless and cruel. She states that she would get great satisfaction to see the Earth destroyed. When Peridot contacted her, she was annoyed by her multiple failures and cared only about bringing her back to Homeworld so she could continue her other assignments.
In "Message Received", she is shown to be an extremely arrogant tyrant who shows little-to-no concern for non-Gem worlds and only cares about things that matter to her. More so, she seems to have a very short temper as she appeared to be furious when Peridot referred to her as a "clod".
She seems to detest organic lifeforms and has a rather strong hatred for the Earth, most likely due to the success of the rebellion.
Yellow Diamond was first mentioned by Jasper in the Season One episode "The Return." Yellow Diamond is most likely either the leader of the Gem Homeworld, or Jasper's and Peridot's superior given the fact that both Gems have a yellow diamond on their outfits. Yellow Diamond also appears to be a greatly feared Gem given Peridot's and Lapis' reactions to Jasper mentioning her.
Yellow Diamond's role in the series was still shrouded in mysteries before, and that she has yet to make a physical appearance in the series. However, many people claim that Yellow Diamond could be seen briefly during a screening of Steven Universe while Rebecca Sugar was attending the San Diego Comic-Con. She could be shown giving a side glance while she was conversing with Peridot, Lapis, and Jasper. It was confirmed that by Rebecca Sugar herself that she was, in fact, the notorious Yellow Diamond. Her main goals are still unknown.
Yellow Diamond first appears in the episode "Message Received".
- Yellow Diamond is the fifth gem to have a last name. Due to the fact that her gem has two words in its name, the first being Rose Quartz, the second being the Desert Glass, the third being Watermelon Tourmaline, the fourth being Lapis Lazuli, the sixth being Rainbow Quartz, the seventh being Blue Diamond, the eight being Blue Pearl and the ninth being Yellow Pearl.
- In Gemology, Diamonds are the stones of truth and victory.
- Yellow Diamond was also mentioned in the episode "The Return."
- In "Catch and Release" Peridot states that she has not received a response from Yellow Diamond since her distress message in "Cry for Help."
- She is shown physically for the first time in "Message Received".
- She is most likely the Yellow Gem seen on the mural in the episode "Serious Steven."
- She's speculated as being a member of the "Diamond Authority," which is later revealed to be true.
- Before her voice actress was confirmed to be Patti LuPone, it was rumored that Yellow Diamond would be voiced by Rebecca Sugar, the creator of the Steven Universe show.