What is the rarest mineral ?

Diamonds are the rarest, harder than Emeralds..

Im not sure but the new Netherriteore or Emeraldore.

emerald is one of the rarest i think and netherite following it

i think emerald if you mean rarest to mine

Currently the rarest (in the Overworld at least) is Emerald.

emerald is rarest i think

the rarest is the emerald, but the must useful, is the diamond

don't know on which version your are but i'm pretty sure that in the latest one it's the netherite !

emerald is the rarest but its barely useful