Homeworld Gems

"The Crystal Gems: The odds are against us, it won't be easy, but we're not going to do it alone!"

"Homeworld Gems" is a term used by the cast, crew, and fandom to refer to the known, non-corrupted Gems who are or have been affiliated with the Gem Homeworld and are not members of the Crystal Gems.

Yellow Diamond
One of the Diamonds at the top of the Gem caste system. She is the supervisor and leader of Jasper and Peridot.

Blue Diamond
One of the Diamonds at the top of the Gem caste system. Not much is known about Blue Diamond, although she does appears to be a high ranking authority figure. She is the former leader of Sapphire and Ruby.

Peridot
A naturally short, professional technician with the sole mission of checking progress on the Cluster. She is currently in a truce with the Crystal Gems to stop the Cluster, and is at the family barn.

Jasper
The brute force of the group, once a great warrior in war. Currently stranded on Earth and stuck fused with Lapis Lazuli as Malachite.

Unnamed Warrior Gem ("Sworn to the Sword")
Last seen fighting against Rose Quartz and Pearl during the rebellion. Current status unknown. Looks similar to the description of a Quartz gem.

Malachite
Fusion of Lapis Lazuli and Jasper. Allegiance unknown. Currently trapped under the ocean at an unknown location.

Former Members

 * Some of the members of the Crystal Gems; cut ties with the Homeworld Gems to stop them from harming the earth and started the war known as "The Rebellion".
 * Rose Quartz
 * Pearl
 * Garnet
 * Ruby
 * Sapphire
 * Lapis Lazuli

History
Over 5,000 years ago, the Homeworld Gems arrived on earth using the Gem Colony Ships and soon after, built the Warp Pads for faster and easier traveling. During the time they had on Earth, they had built the Kindergarten in order to create more Gems at the cost of depleting the Earth of its resources which would inevitably cause great harm to the planet and its inhabitants.

Feeling compassion and seeing the error in their ways, Rose Quartz rebelled and formed the Crystal Gems, a team of rebels who also wanted to protect the earth, and they started the war for Earth known as The Rebellion. Both sides fought valiantly against each other, but the battle that took place on the Gem Battlefield, the Crystal Gems finally won the war, which drove the remaining Homeworld Gems to retreat back to Homeworld, including Jasper. Many Gems were destroyed, reducing the original group of Crystal Gems (who originated on Homeworld) to Rose Quartz, Garnet, and Pearl.

The first member of the Homeworld Gems to be seen many years after the war was Lapis Lazuli, who had been trapped for thousands of years inside a mirror before Steven freed her. He healed her and she returned to Homeworld, only to regret it soon after as Homeworld had advanced so much in the time that she was trapped in the mirror and had found herself out of place. She was soon captured and forced to be the informant in the mission to check the Cluster along with a team of Homeworld Gems.

The second member of the Homeworld Gems to be seen was Peridot, who repaired the Homeworld warp at the Galaxy Warp. She was to check on the current status of the Cluster, but left after finding a Crying Breakfast Friends! sticker, which made her think the site was compromised.

She returned in "Marble Madness", where she tried to check on the Kindergarten again before Steven distracted her, which prompted her to attempt to kill him. However, the remaining Crystal Gems intervened and destroyed the power source of the Prime Kindergarten Control Room, which made Peridot tell them that she would report what had happened.

Lapis was seen again in "The Message", this time using a Wailing Stone in Homeworld to send a message to Steven and the Crystal Gems of an approaching threat coming to Earth. Unbeknownst to them that Lapis had been forced to be the informant of the threat.

During the events of "The Return", Peridot brought with her two Homeworld Gems: her escort Jasper, and her informant Lapis Lazuli, traveling to Earth on the Gem Warship. Jasper helped Peridot defeat the Crystal Gems and take them back to the Homeworld. However, their plans were foiled when the Crystal Gems managed to fight back and defeat them, crashing their Warship in the process and stranding Peridot somewhere on Earth after she escaped on an escape pod. In one last ditch effort to defeat them, Jasper fused with Lapis to become Malachite, a monstrous fusion who sealed herself in the ocean by Lapis' will.

Peridot's primary mission for coming to Earth was seen in "Keeping it Together". She had, on various occasions throughout her appearances, stated on checking up on something called "the Cluster". In the aforementioned episode, the Cluster is revealed to be the result of an experiment done by the Homeworld Gems on fusion. The Homeworld Gems had taken the shards of fallen Crystal Gems during the war and experimented on them, forcibly fusing the shards to create it.

Trivia

 * Many fans have nicknamed the leader(s) the "Great Diamond Authority" based on Ronaldo's conspiracy theory created in "Keep Beach City Weird." Later, "It Could've Been Great" confirmed that they are actually called "The Great Diamond Authority".