Sailor Locket

The Sailor Locket, also known as simply Locket, was Serena's first magical item granted to her by Luna. Once the magical phrase "Moon Prism Power" is called, Serena uses this locket to transform into Sailor Moon.

The Sailor Locket was destroyed during the battle with the Cardian, Racy. This locket was upgraded to the Crystal Star Locket when Queen Serenity combined the (destroyed) Sailor Locket with the Imperium Silver Crystal.

Trivia

 * In the Japanese version, this item was known as Transformation Brooch.
 * There are five colored circles on the locket; aside from pink in the center for Sailor Moon, the four small circles outside each represent her teammates colors: blue for Sailor Mercury, red for Sailor Mars, orange for Sailor Venus, and green for Sailor Jupiter.