There are many stones in pokemon, and many stones have the same rarity. In my opinion, the rarest stone is either the sun or dusk stone.
'Rare' used to describe a natural diamond describes many diamonds. Red is generally acknowledged as the most rare natural colour in diamonds. Then, the Moussaieff Red, could be called the world's rarest diamond. You can read more about this stone, below.
rarest eye color is GREEN
mew2 is the rarest
June's Alexandrite. Very difficult to find natural Alexandrite due to its rarity. Most is created in a lab
Well the rarest jem is Emerald and the 2nd rarest is Diamonds 💎
i am the most rarest woodpeckerdidn't you know that
The temperate forest is the rarest biome.
there is no rarest Pokemon you have to train and train and including shinies there is no real rarest Pokemon at all.
Pikman or Pokemon The Rarest is mewtwo
The rarest Pokemon is Dialga
no the spider is not the rarest sillyband
The rarest is stantler.