Finding dehydrated cubes/Chances of finding one?

komrade michael

Sorry if this is completely unrelated to the current event...
While I was mining today, I got a red cube after mining around 1k sand, but when I just started mining some mesa blocks by the portal door (in a desert mine), I got a green cube within 30 blocks. Does anyone know if this is related to mining by the portal door, or any tricks that are proven, or the approximate chances of finding a certain type of dehydrated cube?
I sound really stupid don't I...
I'm new, if I'm posting on the wrong category can anyone tell me?

Alv'

The chances are random I think, maybe you are lucky. Few days ago while I was mining in my giveaway realm, I mined first block and got purple cube, another 10 blocks, green cube.

Cubic

I would be curious to see the stats though