Religious event
This all began when some idiot started to chop off the chunks of comet and started to melt them down, without a second thought about the radiation. Which was in the year 2010. After a period of time the smiths changed the metal, in small pieces of jewelry. And the rumor started that the jewelry enhanced the magic of the Witches. Which contributed to the decision to forbid large pieces of jewelry. In 2020, ten years after the fact, the three crowns were made to show some appreciation for the Three Witches and mark them as official rulers, which they already were, but that is not the case. Silver Storm, was the first of the Three witches to receive her crown. The Witches of the Morning and Afternoon got theirs in their respective day period.