if a Redstone mechanism(screenshot 2) that once in a very small interval of time produces an output signal and connect a sticky piston with a slime block on it,and this unit will stand raised amethyst,upon connection of the piston amethysts will multiply and appear out of nothing with a rather fast speed,as a side effect - when breaking the piston when it is advanced,I have one of their amethyst hung in the air(screenshot 1 and 2)

Translated by a translator,the translation may not be accurate.