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|This article is about Unknown Gems. You may be looking for Minor Gem Characters.|
In Steven and Jamie's play, "Beach City or Bust", props for a Crystal Gem fusion and Corrupted Gem Monster can be seen. Not strongly resembling any other fusions, this is a fusion between some (or all) of the Crystal Gems. This fusion fights off a Corrupted Gem resembling both the Centipeetle Mother and the Big Bird.
There are many unknown Gems (represented in silhouettes during Garnet's flashback) in "The Answer". These Gems make up Blue Diamond's court.
|Image||Color||Gemstone (Shape, Location)||Other Info|
|Dark Burgundy||Oval; Right Elbow||She has a head shape similar to that of Topaz.|
|Teal||Tear Drop; Chest||She has pointy hair and a knee length dress.|
|Sky Blue||Tear Drop; Chest||Her hair and gemstone placement are similar to that of Yellow Diamond. However, her dress, gem cut, and color in the picture are different.|
|Deep Blue||Tear Drop; Back||Her body, hair, outfit, gemstone, and gemstone placement are extremely similar to that of Lapis Lazuli.|
|Blue||Unknown||She has a broken knee length dress. Details about her body, hair, and gemstone are unknown.|
|Cerulean||Rectangle; Collar||She has poofy hair in a bun, and she is wearing a dress. She is very similar to another unknown Gem that appeared in "Cheeseburger Backpack"|
|Gray-Blue (Initially Navy Blue)||Upside-Down Tear Drop; Chest||Her hair is similar to that of Dr. Maheswaran, and is also similar to an unknown Gem seen in "Cheeseburger Backpack".|
|Light Pink||Hexagon; Navel||Her hair is similar to that of Rainbow Quartz and has a pointy nose; this unknown Gem is very similar to one seen in "Cheeseburger Backpack".|
|Pink||Square; Navel||Her hair is similar to an upside-down comma, similar to that of the defending Zircon.|
|Burgundy||Rhombus; Right Eye||Her body, hair and gemstone shape are extremely similar to that of a quartz.|
|Pink||Rhombus; Right Eye||Her body, hair and gemstone shape are extremely similar to that of a quartz.|
|Burgundy||Circle; Chest||She is bald and very bulky, muscular, and large. She was poofed by Pearl. Her gem shape and physique bear resemblance to Topaz.|
|Hot Pink||Circle; Chest||She is bald and very bulky, muscular, and large. She was poofed by Pearl. Her gem shape and physique bear resemblance to Topaz.|
|Carnation Pink||Circle; Chest||Her hair is in a pointed "swoop", and she is wearing a robe.|
|Lavender||Unknown||Her hair is similar to that of Padparadscha and is the only Gem whose silhouette does not contain defined hips and hands. Her gemstone's shape and location are currently unknown.|
|Mauve||Oval; Left Elbow||She has hair pointed to the left and a muscular build similar to that of a Quartz. Her hair, however, is very short, a characteristic not yet seen in any Quartzes except "Skinny" Jasper (and Amethyst in Greg's flashback in "We Need to Talk").|
|Salmon||Oval; Chest||She has hair in two buns. Her body shape is similar to that of Garnet.|
|Lavender||Triangle; Chest||Her hair is pointed in two triangular buns and is wearing a floor length dress. This gem (except her gemstone's cut) bears a strong resemblance to that of Holly Blue Agate.|
There are a few unknown Gems featured in Lapis' flashback.
There are a few unknown Gems featured in Centipeetle's flashback.
- "Crazy Lace" (former Crystal Gem, mentioned by Bismuth)
- "Biggs" (former Crystal Gem, mentioned by Bismuth)
- "Snowflake" (former Crystal Gem, mentioned by Bismuth)
- Other Amethysts (former Crystal Gems, mentioned by Bismuth)
- Nephrite (Homeworld ship pilot, mentioned by Bismuth to Pearl)
- Many Corrupted Gems are seen trapped in cages in the Beta Kindergarten. Their bodies are hidden by shadows and only their glowing yellow eyes can be seen.
- Unknown Defective Carnelian (Mentioned by Peridot)
Another Corrupted Gem can be seen in a cage. Only its two eyes and large six-clawed hand can be seen.
When Steven is adjusting the Roaming Eye's form calibration system for the Crystal Gems, a small type of Gem, possibly Aquamarine, can briefly be seen on the panel, which subsequently alters the Crystal Gems' forms to be small.
Also, a large type of Gem, presumably Quartz, Topaz, or Bismuth can be seen.
A number of Rose Quartz gems appear bubbled in a room of Pink Diamond's Zoo.
They are also mentioned on "The Trial" by the defending Zircon, who states that there were none in Pink Diamond's entourage or her guard during The Rebellion before her demise, due to a Rose Quartz being seen as a threat.
The defending Zircon states that Pink Diamond's entourage was composed of several Agates, Sapphires, and her Pearl.
Various pieces of old statues can be seen at the beginning of the episode. One appears to be a fusion of two unknown gems, while the head of a large statue has a gemstone with the same cut as a Rose Quartz's on its forehead.
Rhodonite's components are an unknown Ruby and Pearl, while Fluorite's components are six unknown Gems.
Morganite, an unknown Gem, is mentioned by Rhodonite. She was in charge of the two halves of Rhodonite (a Pearl and a Ruby) before she replaced them after she found out that they had fused.
During Garnet's brief flashback of the Rebellion, two unknown Gem silhouettes appear fighting Pink Diamond alongside Garnet, Pearl, and Bismuth.
- On the left of the image there is a Gem with short hair around the same height of Pearl. She appears to have a thin build. Her hair is similar to the Rutile Twins'.
- On the right of the image there is a short Gem. She resembles one of the unknown Gems in "The Answer".
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There are some unknown gems in Heap of Trouble.
During a flashback to Hessonite's past, several unknown Gems are seen during the war.
Gems mentioned to be Citrines by Garnet can be heard guarding a door on Hessonite's war ship, but they're not seen. The same Cirtrines believe the sounds they're hearing are the result of a Nephrite drill.
- The unknown Quartz warrior in "Sworn to the Sword" is voiced by Michaela Dietz, implying she may be an Amethyst (or some other type of Quartz).
- The Gems mentioned by Bismuth all correspond to real-life minerals. "Crazy Lace" is a variety of Agate. "Biggs" is a variety of Jasper. "Snowflake" is a type of Obsidian. "Nephrite" is one of the minerals called jade.