Back Away Slowly

This article follows the canon of CIU, which deviates greatly (for Treble in Tokyo) or even minorly (other fanons) from canon. No one else is obligated to follow the SV canon.


Boulder is an average height gem of a seemingly chubby physique. She has light teal skin, black eyes, and long, dark brown hair pulled back into a ponytail. Her entire outfit consists of a mismatched, steampunk styled dress and thigh high boots.


Boulder Opal doesn't tend to speak too much. She keeps to herself but does many selfless acts in order to better the environment or anything. Though, as a private investigator or a helper to many, she is forced to talk quite a bit.


Boulder Opal possesses standard Gem abilities and traits.


  • Spear Proficiency : While Boulder uses a staff, her fighting style (kick-boxing-like) utilizes it more as an extra support.
  • Gun Proficiency : The same applies to her guns which detach from each other and reattach to make the staff.

Unique Abilities

  • Colour Change : While not very often, Boulder Opal can change the colour of her skin, eyes, hair, and staff.



Boulder Opal and Coral have a fairly well developed relationship, close friends out of work but only in situations which they can meet.


Boulder Opal acts as a disciple of Peacock Topaz, understanding an extensive history of the gem, especially of her affiliation with Coral and Angelite.

Harlequin Opal

While not explicitly stated, Harlequin and Boulder seem to have a relationship as close as 'dating'.


Image Description
Boulder's gem is located on her right waist and is of a circular cabochon.
A photo of an actual Boulder Opal.


  • She is lightly based on RWBY's Sun Wukong.


Caelum Iterum Universum
Treble in Tokyo
Characters CerussiteMorganitePrasioliteTaaffeitePink SpinelAngeliteTrebleMoonstoneRhodoniteLepidocrociteCrocoiteRose AuraSunshinePurpleCelestineJeremejeviteJelly Opal
Episodes GrimMissionLyfeFearFellBleakBreakFray
Ships Ga1aWitcheryMagic TwinsColdWings WarmHeart
Caste Labyrinth
Template See here.
Loneliness on World Y
Template See here.
Art Blogs Requests 1Finished 1Raffle 1Winners 1Fusions 1Requests 2Finished 2Raffle 2
Other Blogs Cameos 1RP Idea 1Promo 1Inactivity 1Cameos 2Help Desk 1
Acts 1-3
Introduces Boulder OpalWatermelon OpalDraviteCoralFlower StoneAmetrine
Episodes HelloGreetingsUncovered

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