Everyone knows the Green ones eh? those are by far the rarest ingots you can get hehe
the one you have is indeed old smelted NPC ar, not worth anything close to a mil, and dude no offence but if you sold those for a mil a pop then you got some hella good deals lol.
Coal ingots i sell for 100k per, as i do NPC ingots....NPC ingots are slightly more rare, 150-250k is avr price for em