Onyxian is a term from the quartz system for being maverique, aporagender aligned, or atrinary aligned. It can be described as a gender that is never empty, and starts of genderless but an unidentified gender that grows overtime, similar to a white hole.
The flag was based of the actual stone red onyx with a black diamond in the centre to symbolise gemstones. It was made on the same day it was coined by FANDOM user RoseWatera.
The second flag was coined by FANDOM user Kudorix. Dark to faded navy blue stripes mean starting as agender but becoming an unidefined gender over time, light grey stripes mean an alignment different than neutral, feminine, masculine or xenic. The bright yellow diamond mean an unknown gender and the ring around it mean maverique, apora and atrinary.
The term was coined on the 23nd of November 2020 by FANDOM user RoseWatera as a part of the quartz system. This page is the original source of the term.