Star Crystal

The Star Crystal (later known as the Dark Crystal, the Black Crystal and the Homing Crystal) is a black-coloured crystal that was used by the Negaverse in Sailor Moon.

Neflite received it from the stars in Episode 19, Molly's Folly, to track down the Imperium Silver Crystal. It reacted to Molly because she was in love with him. Zoycite's monster Yasha thought it was the silver crystal. When Zoycite found out that Neflite was in love with Molly, she sent Housenka, Grape, and Suzuran to kidnap Molly, kill Neflite, and take the Star Crystal. They told him to give them the star crystal, but he beat them up and escaped with it and Molly. However, when Housenka killed Neflite, Zoycite took the crystal.

Afterward, Queen Beryl changed the Star Crystal to be used by Zoycite as a homing crystal to track down the seven Rainbow Crystal carriers so she could extract their crystal and awaken the Seven Shadows within them.

In Episode 37, Tuxedo Unmasked, Prince Darien, now brainwashed by Queen Beryl, used the star crystal to trap the rainbow crystal carriers so Beryl could harness the powers of the Seven Shadows (though already destroyed by Sailor Moon), the Negaverse may still be able to create the Invincible Shadow with this energy.

Darien trapped all but Raye's grandpa inside it, before Sailor Mercury managed to take it from him and smashed it on the ground, destroying it and releasing the crystal carriers.