What is the state of kryptonite at room temperature?

Kryptonite, a fictional substance from the Superman comics, is typically depicted as a green, crystalline mineral. In various adaptations, it is often shown as solid at room temperature, emitting a faint glow. Its properties can vary depending on the storyline, but it is generally portrayed as having a significant impact on Superman and other Kryptonians. As a fictional material, its exact state and characteristics are not scientifically defined.