Cluster Gems

"The Cluster" is a forced fusion of former Crystal Gems. It first appeared "Keeping it Together". It was made by forcing Gem Shards of fallen Crystal Gems together through being buried together for a long time due to extensive pressure from being underground.

Appearance
The Cluster takes the form of limbs joined together to other appendages. The limbs are of mismatched color, indicating that they originally belonged to different gems.

A giant variant of a Cluster appears to be comprised entirely of limbs conjoined together in a single body, wrapped in a grey cloth. At its core, the fusion is comprised of four different shattered Gem Shards that are physically fused together. It possesses four, large eyes. The Clusters' irises and visible Gem Shards are green, yellow, blue, and purple.

"Marble Madness"
The Cluster makes a semi-hidden cameo when Peridot is accessing the Facet Five Kindergarten control room.

"Jail Break"
When Peridot and Jasper are at Sapphire's prison, Peridot says to Jasper, "We can't leave yet! The whole point of coming here was to check on the Cluster!".

"Keeping it Together"
The appearance of the Cluster was so horrifying to Garnet that she became unstable to the point where she almost defused. It is for this reason that Ruby believes the Cluster was created as punishment by Homeworld for the Rebellion. It was eventually 'poofed' by Garnet and currently resides within one of her bubbles in The Burning Room with the other fusion experiments.

Trivia

 * The Clusters are the first forced fusion in the series.
 * The Cluster is the first fusion to never speak in the series (not counting the screams emitted by it); the second being Rainbow Quartz.
 * The blue "leg" off to the left appears to have the same boots as Amethyst and Ruby.
 * The silhouettes of the Cluster members have traits similar to other Gems on the show, most obviously Pearl's "Pilot" hairstyle.
 * It should be noted that when the Gem fusion's body silhouette appears, each "body" seems to have a similar body type, and hair style, implying that the attempted forced fusion may have been somewhat successful, before they reformed into a limb-comprised hand.
 * When the Cluster's bubbled gem was sent back to the The Burning Room, its gem reshaped itself to appear like the Centipeetle Mother's gem. This is confirmed to be an animation error.
 * The boot thumb of the Cluster is most likely a joke that the thumb is not considered a finger.
 * The cluster's eyes are shaped like lemons.

Cultural References

 * The Cluster bears many similarities Frankenstein's monster from the Mary Shelley novel of the same name.
 * Both are made out of body parts of different deceased individuals, acquired from grave robbing.
 * They are unnatural creations which were created through scientific means.
 * Both are represented as tragic, yet horrifying figures.

Gemology

 * A Cluster of gemstones is a result of gems that fuse together due to extensive pressure from being underground. In most cases clusters are usually fusions of the same gemstone, however, in very rare cases, it is possible for clusters to form from different gemstones.

Gemstone(s)
pt-br:Cluster