Hemimorphite is a character from the manga and anime series Land of the Lustrous. In terms of physical appearance, Hemimorphite is depicted with blue eyes and blue hair that reaches waist-length. They appear as an adolescent and are characterized as a female in some sources. Hemimorphite is identified as a member of the side cast of gems, and their role in the story is that of a minor or extra character.

In the narrative, Hemimorphite is most frequently seen accompanying Watermelon Tourmaline. The pair often works together, typically in the context of combat or patrolling duties against the Lunarians, the moon-dwelling antagonists who seek to capture the gem people. During a moment of significant distress for the protagonist, Phosphophyllite, Hemimorphite and Watermelon Tourmaline are among the gems who encounter them on the beach. They express concern for Phosphophyllite's well-being following a traumatic incident, though they are confused by the protagonist's unusually cheerful demeanor when asked about it. Later in the story, Hemimorphite and Watermelon Tourmaline are shown working together again, this involved in the delicate task of hiding pieces of Phosphophyllite's shattered body and tricking another gem, Morganite, into properly securing them.

Hemimorphite also appears in a peaceful, everyday context much later in the timeline. They are present with a group including Watermelon Tourmaline, Obsidian, and Ghost Quartz as they discuss plans to visit an amusement park, demonstrating the long periods of relative calm that punctuate the gems' existence. The search results do not provide specific information regarding Hemimorphite's personality, individual motivations, distinct abilities as a fighter, or a personal character development arc. No details about their backstory or origins before the events of the series are available.