The circular brooch that Sailor Moon uses to transform in all iterations of the first season of Bishoujo Senshi Sailor Moon. She shouts "Moon Prism Power, Make Up" to transform.
There are actually two distinct designs for this brooch; one from the manga and Crystal, and the other from the 90s anime. Both are designed with a crescent in the center, circled by four colored gems representing the four Inner Senshi who protect her.
You want to be able to see the brooch's details up close to make sure it's not a different type of compact that Sailor Moon uses. If you cannot see what it is, or it's drawn so far away that it's rendered as a generic brooch, don't use this tag.