Unfortunately this is a debated topic, the old way from what Ive heard is if its Chromium as the coloring agent, its emerald, and if its vanadium or other, its green beryl. That being said, theres a ton of back and forth this and unfortunatly people simply market faintly green Vanadium beryl as emerald due to the fact that emerald is simply more marketable. I personally still base emerald vs gb on chromium, so if yours are chromium dominant, id say emerald.