|This article is about Unknown Gems. You may be looking for Minor Gem Characters.|
There is an unknown Gem seen in the play Steven and Jamie put on in "Historical Friction". She does not appear to resemble any other fusions. It is implied that she is a fusion of some or all of the Crystal Gems. There is also a monster; it is most likely a Gem monster.
There are many unknown silhouette Gems in The Answer in Garnet's flashback.
|Image||Color||Gemstone (Shape, Location)||Other Info|
|Dark Burgundy||Oval; Right Elbow||She has Ruby-esque hair in two buns.|
|Teal||Tear Drop; Chest||She has pointy hair and a knee length dress.|
|Sky Blue||Tear Drop; Chest||She has double-pointed hair with bangs and wears a floor length dress similar to that of Yellow Diamond.|
|Deep Blue||Tear Drop; Back||Her body, hair, and gemstone are extremely similar to that of Lapis Lazuli.|
|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.|
|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 was bald and very bulky, muscular, and large. She was poofed by Pearl.|
|Hot Pink||Circle; Chest||She was 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||She has short hair 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.|
|Salmon||Oval; Chest||She has hair in two buns.|
|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 an unexplainable 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.
There are numerous bubbled Rose Quartz-type Gems in Pink Diamond's Zoo sanctuary.
- The unnamed Gem warrior from "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.