Malachite is the fusion of Jasper and Lapis Lazuli, who first appeared in the episode "Jail Break". After being fused for several months, she is finally defeated by Alexandrite during their battle in "Super Watermelon Island".
Malachite is a massive fusion, nearly equal in size to Sugilite on all fours and Alexandrite on her back legs. She possesses six arms, of which the lower four function as legs. She has four eyes with light-teal irises and pointed teeth. Her first set of eyes function as eyebrows. Her eyes change shape based upon who is controlling her, with her eyes being small and catlike as Jasper and a larger, rounder shape as Lapis. Her wavy pale-green hair, styled in a star like Alexandrite's, is a short bob like Lapis', but wild and frizzy like Jasper's. Her skin is light sea-foam green with dark-teal stripes, and its pattern is similar to Jasper's. She has two torsos joined, similar to a Centaur. Her upper torso and arms are longer and more slender while her lower torso and four limbs are more muscular. The upper half of her outfit, which is a deep-green and greenish-black stretched halter top, has a pattern like Lapis' suit with a neckline like Jasper's while its lower half is a greenish-black "uniform" similar to Jasper's with a V-neck "collar" that connects to form a Yellow Diamond insignia, serving as a waistband for her upper torso.