Don't know about the US . But I did see a video of some old timer quarrymen doing that in the UK.
Fresh limestone is generally very soft. It carbonates upon exposure to air and hardens.
Like brick, the smallest a piece of quarried limestone will ever be is when it leaves the quarry/kiln for brick. It swells, it carbonates, and it changes color. ,
:thumbsup:It grows because it is released from the pressure of being in the ground.