An amber with a mosquito in it is of far more value for me than a 2 kilo diamond really.
You have a possible fossil there, diamonds are just really really really old coal that was shaped by pressure of time and rocks.
The very fact that you can "grow" them in labs should already lower their prices tbh.
Apparently you can recognize which one if synthetic and which one is real, just skip the fact that both are real lol.