I believe that as long as the neon spinel has a bright red toned fluorescence under UV light it can technically qualify as a Jedi Spinel. You can go more in depth and say that only those with a predominantly red hue and with an origin from a specific mine qualify, but labs all over the world have yet to agree on where the line is drawn. It’s really turned into an industry term like “pigeon blood” if you ask a novice like me.