|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".
|Image||Color||Gemstone (Shape, Location)||Other Info|
|Dark Burgundy||Oval; Right Elbow||She has hair 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 gem placement are similar to that of Yellow Diamond. However, her dress, gem cut, and colour 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. Her body, hair, gemstone placement 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||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 Blue 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.|
|Hot Pink||Circle; Chest||She is bald and very bulky, muscular, and large. She was poofed by Pearl.|
|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" (Crystal Gem, mentioned by Bismuth)
- "Biggs" (Crystal Gem, mentioned by Bismuth)
- "Snowflake" (Crystal Gem, 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.
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 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.
Several Rose Quartzes appear bubbled in a room of Pink Diamond's Zoo.
They are also mentioned on "The Trial" by the defending Zircon who states that they were bubbled during The Rebellion before Pink Diamond's death.
The defending Zircon states that Pink Diamond's entourage was composed of several Agates, Sapphires, and her Pearl.
Rhodonite's components are an unknown Ruby and Pearl, while Fluorite's components are six unknown Gems.
Morganite, an unknown Gem commander, is mentioned by Rhodonite. She was in charge of the two halves of Rhodonite (a Pearl and a Ruby) before she replaced them when she caught them fusing.
Various pieces of statues can be seen at the start of the episode.
- The Unknown Quartz Warrior in "Sworn to the Sword" is voiced by Michaela Dietz. This may imply she is an Amethyst or some 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.