Berylian is a gender in the Nadurian System, one of the four Nature Systems. It is a gender which is both connected to nature and its overall aesthetics but which has a specific and strong connection to nature's colors and color themes. One may feel like their gender is specifically related to nature colors, or they may feel that a certain aspect of their gender can relate to certain nature colors. For example, someone may feel that their gender is related to nature colors if their gender feels related to pastel greens and blues. Berylian people can have any alignment and/or no alignment, and depending on what alignment they have, they could use another term from the Nadurian System to describe themselves. For example, a berylian person who is fiaspec could say they're rhosynic berylian, from rhosynian. Berylian people may or may not also identify as a certain kind of, or generally, colorgender.
The term "berylian" comes from the English word "beryl," describing a deep shade of green.