That was Rainbow Quartz. Pearl thought a fusion might give your video a little... something extra.
|—Rose Quartz, "We Need to Talk"|
Rainbow Quartz has multi-colored voluminous hair which appears to be a mix of Pearl and Rose's hair. It is long, large, and wavy like Rose's, while each tuft ends in a distinctive point like Pearl's. However, her palette is unknown due to the tinted lighting present in her only appearance. However in concept art her palette depicts her having a lavender complexion with blonde or pink hair.
She possesses only a single pair of arms, and is slender and curvaceous with a tall stature, standing a few inches taller than Opal. Rainbow Quartz possesses two pairs of eyes; the top pair of eyes (Pearl) are larger and more rounded and colored a pale indigo, whereas the bottom pair (Rose) are thinner and more shapely with black pupils. Her nose is shapely and pointed like Pearl's nose, but short with discernible nostrils like Rose's. She also has defined lips that are similar to Rose's, although Rainbow Quartz's lips lack the sheen of Rose's.
Rainbow Quartz wears a sleeveless, skin-tight pinkish-peach strapless leotard with violet high-leggings. There is a stylized, downward pointing, arrowhead-shaped cut-out on the stomach area of the leotard where Rose's gemstone is. She also wears a loose, sheer, transparent long-sleeved, bright and pastel blue blouse with thin lime-green outlines over her upper body. Her outfit includes no footwear, but instead has long, magenta legwarmers that cover half of her lower legs and feet.
Rainbow first appeared while Rose, Garnet, Amethyst and Greg were filming a music video for his song "What Can I Do". During Greg's guitar solo, Pearl walks up to Rose and convinces her to fuse. After fusing and meeting Greg, Rainbow performed a couple of dance moves for the music video, all while Greg watches in amazement and disbelief.
Moments before defusing, Rainbow gave Greg a malicious look, most likely coming from Pearl, followed by her performing one last move before defusing back into Rose and Pearl. When the video ends, Rose introduces Rainbow Quartz to Greg, as well as the idea of fusion, as Pearl had suggested creating her to give something extra to the video.
While Rainbow Quartz did not physically appear, she was indirectly mentioned by Pearl as she was singing "It's Over Isn't It".
Rainbow Quartz is assumed to possess standard Gem abilities and traits. Being a fusion of Pearl and Rose Quartz, it can be assumed that she is a strong warrior, like Rose, and agile, like Pearl.
She is very agile and graceful, as she can stand on the tips of her toes and execute acrobatics. Her weapon is yet to be seen, as she was only formed by Rose and Pearl for Greg Universe's music video. Given as Rose Quartz no longer exists, it is unknown if Rainbow Quartz will ever be seen again, although it is assumed that if Steven were to fuse with Pearl, they would become Rainbow Quartz, although they would look immensely different.
|1. "Full Disclosure":||Absent||14. "Historical Friction":||Absent|
|2. "Joy Ride":||Absent||15. "Friend Ship":||Absent|
|3. "Say Uncle":||Absent||16. "Nightmare Hospital":||Absent|
|4. "Love Letters":||Absent||17. "Sadie's Song":||Absent|
|5. "Reformed":||Absent||18. "Catch and Release":||Absent|
|6. "Sworn to the Sword":||Absent||19. "When It Rains":||Absent|
|7. "Rising Tides, Crashing Skies":||Absent||20. "Back to the Barn":||Absent|
|8. "Keeping It Together":||Absent||21. "Too Far":||Absent|
|9. "We Need to Talk":||Debut||22. "The Answer":||Absent|
|10. "Chille Tid":||Absent||23. "Steven's Birthday":||Absent|
|11. "Cry for Help":||Absent||24. "It Could've Been Great":||Absent|
|12. "Keystone Motel":||Absent||25. "Message Received":||Absent|
|13. "Onion Friend":||Absent||26. "Log Date 7 15 2":||Absent|
|1. "Super Watermelon Island":||Absent||13. "Kiki's Pizza Delivery Service":||Absent|
|2. "Gem Drill":||Absent||14. "Monster Reunion":||Absent|
|3. "Same Old World":||Absent||15. "Alone at Sea":||Absent|
|4. "Barn Mates":||Absent||16. "Greg the Babysitter":||Absent|
|5. "Hit the Diamond":||Absent||17. "Gem Hunt":||Absent|
|6. "Steven Floats":||Absent||18. "Crack the Whip":||Absent|
|7. "Drop Beat Dad":||Absent||19. "Steven vs. Amethyst":||Absent|
|8. "Mr. Greg":||Mentioned||20/21. "Bismuth":||Absent|
|9. "Too Short to Ride":||Absent||22. "Beta":||Absent|
|10. "The New Lars":||Absent||23. "Earthlings":||Absent|
|11. "Beach City Drift":||Absent||24. "Back to the Moon":||Absent|
|12. "Restaurant Wars":||Absent||25. "Bubbled":||Absent|
- Rainbow Quartz is the only Fusion Gem in the series who has not said a word since her debut.
- Rainbow Quartz has yet to summon her weapon.
- Her appearance bears a striking resemblance to the character Danse from the TV cartoon series, Jem and the Holograms.
- Her outfit closely resembles an 80s-90s dancing/workout outfit.
- Her skin, hair, and gemstones' colors are unknown due to the tinted lighting during her only screentime.
- She was the first fusion on-screen to de-fuse of her own will. Other fusions have been damaged, broken, or have fallen out of sync.
- Her formation was the first time Greg saw Gems fusing.
- Rainbow Quartz is the first fusion revealed to involve Rose Quartz.
- She is also the first fusion involving Pearl that does not have her dominant nose trait - rather, it is upturned and slightly pointy.
- Her eyes seem to be expressing the different emotion of each of her parts towards Greg, a loving look from Rose's eyes and a cocky/boastful look from Pearl's.
- The term "rainbow quartz" can refer to two different types of gemstones:
- Iris quartz, sometimes also marketed under the name "Rainbow Quartz" or "anandalite", is a quartz crystal displaying interior spectral colors under some of the crystal faces from refraction due to brazil-law twinning in the crystalline structure.
- A metal-coated quartz, (aka Aura Quartz), in this case, an Angel Aura Quartz which is artificial, has a metallic rainbow coloration on the surface and is created by applying a microscopic layer of metal (typically titanium, but more frequently, in this specific kind of aura quartz, platinum and silver) to a heated quartz crystal via vapor deposition.
- This is not to be confused with the Rainbow Aura Quartz. Despite the name, the character does not have a relation to this type of metal-coated quartz.
- Rainbow quartz are associated with hope and optimism.
- Quartz gemstones are very durable and hard.
- Rainbow quartz is not a traditional birthstone.
| Pearl's gemstone on Rainbow Quartz, featuring a large ring around the middle. It is smooth, without facets.
|Rose Quartz's gemstone on Rainbow Quartz, featuring a pentagonal facet. It is a dodecahedron.|