Rainbow Fluorite has styled mint green hair and fog skin, plump lips, the top of which is teal. She has an unknown amount of eyes. She has eight arms, a thin build, and a small chest, torso, and hips. Like Alexandrite, she has a second monstrous mouth with a dark teal tongue, which is hidden by her face. Her gemstones are embedded in her upper palms, forehead, chest, and her sternum.
She wore a V-neck sleeveless dark royal purple top with large, pointed shoulder pads, which were teal underneath. She wore a fat crescent-shaped dark pine green visor that lacked a bridge. She had a teal waistband which connected to an inverted dark royal purple triangle along with her pelvic area. She had teal leggings which ended at the knee and connected to a pair of violet knee-length boots. Her top three sets of arms wore a pair of dark grey elbow-length gloves, two pairs of elbow length gloves, and light forest green armbands on her lowest set of arms.
She wore a rounded triangular deep V-neck top with white shoulders with a black-purple neckline surrounded by a teal section. She has a dark pine green visor that splits into five and acts more like lenses. She had a teal waistband that connected to a pair of black-purple leggings that split off into a pair of real "boots." Her arms wore light purple, violet-pink, and dark grey shoulder-length gloves, while her lowest set of arms wore light forest green armbands.
She wears a rounded triangular top with white shoulders, a black-purple neckline, and a lower teal section. She has a dark pine green visor that splits into five and acts more like lenses. She has a black-purple waistband which separates her white leggings with a teal-blue waistline. Her leggings split off into a pair of black-purple "boots." Each of her hands wears a pair of black-purple, violet, or purple elbow-length gloves, with the exception being her lower set of arms, which have dark grey elbow-length armbands.
Rainbow Fluorite's outfit became bluer as of her redesign. Though she keeps mostly the same shape, she now sports a star-shaped neckline, navy shoulder pads, and a rounder boot outline. S=In this regeneration, she loses two parts of her formerly split-in-five visor.
GemCrust describes Rainbow Fluorite as an unstable fusion that can't maintain herself for too long. She is more chatty than Alexandrite but can sometimes be as stoic as Sapphire. She also seems to enjoy her multiple abilities and weapons. Rainbow Fluorite has "a rock'n'roll personality."
Rainbow Fluorite possesses standard Gem abilities, bubbling, shapeshifting, fusion, regeneration, agelessness, and superhuman strength/durability.