Gems are the fictional alien species that make up a large part of the Steven Universe cast. All Gems have a gemstone embedded somewhere on them, which is the only true part of their body and acts as a brain. The rest of their body is made of magic light that acts "like a hologram, but with mass" and can be altered in nearly all ways other than color. Their forms can be temporarily altered through shapeshifting or permanently altered through "poofing", the process in which a Gem's form is harmed so badly that it disappears and leaves only the gemstone behind. While poofed, a Gem can take time to choose what they will look like when they reform, and whatever they choose will be their default appearance until they are poofed again.
Known Gems
Diamonds
- Blue Diamond (Steven Universe)
- Pink Diamond (Steven Universe)
- White Diamond (Steven Universe)
- Yellow Diamond (Steven Universe)
- Steven Quartz Universe
Fusions
- Alexandrite (Steven Universe)
- Amethyst (Steven Universe), Garnet (Steven Universe), Pearl (Steven Universe)
- Lemon Jade
- Malachite (Steven Universe)
- Jasper (Steven Universe), Lapis Lazuli (Steven Universe)
- Mega Pearl (Steven Universe)
- Pearl (Steven Universe), Pink Pearl (Steven Universe)
- Obsidian 1.0
- Amethyst (Steven Universe), Garnet (Steven Universe), Pearl (Steven Universe), Rose Quartz (Steven Universe)
- Obsidian (Steven Universe)
- Amethyst (Steven Universe), Garnet (Steven Universe), Pearl (Steven Universe), Steven Quartz Universe
- Opal (Steven Universe)
- Amethyst (Steven Universe), Pearl (Steven Universe)
- Sugilite (Steven Universe)
- Amethyst (Steven Universe), Garnet (Steven Universe)
- Rainbow Quartz
- Pearl (Steven Universe), Rose Quartz (Steven Universe)
- Rainbow Quartz 2.0
- Pearl (Steven Universe), Steven Quartz Universe
- Sardonyx (Steven Universe)
- Garnet (Steven Universe), Pearl (Steven Universe)
- Smoky Quartz (Steven Universe)
- Amethyst (Steven Universe), Steven Quartz Universe
- Steg (Steven Universe)
- Greg Universe, Steven Quartz Universe
- Stevonnie (Steven Universe)
- Connie Maheswaran, Steven Quartz Universe
- Zebra Jasper (Fusion)
- Jasper (Steven Universe), Ocean Jasper
- Garnet (Steven Universe)
- Ruby (Steven Universe), Sapphire (Steven Universe)
Garnets
Lapis Lazulis
Pearls
- Aubergine Pearl
- Blue Pearl (Steven Universe)
- Lonely Pearl
- Pearl (Steven Universe)
- Pink Pearl (Steven Universe)
- Yellow Pearl (Steven Universe)
Rubies
- Army (Steven Universe)
- Doc (Steven Universe)
- Eyeball (Steven Universe)
- Leggy (Steven Universe)
- Navy (Steven Universe)
- Ruby (Steven Universe)
Sapphires
Quartzes
- Amethyst (Steven Universe)
- Angel Aura Quartz
- Holly Blue Agate (Steven Universe)
- Jaspers
- Biggs Jasper
- Jasper (Steven Universe)
- Ocean Jasper
- Zebra Jasper
- Rose Quartzes
- Hippie Rose Quartz
- Rose Quartz (Steven Universe) (In form only, as her gem is a Diamond)
- Superfan Rose Quartz