What is a Black Heart?

Does Joan Jett have one?  Or is Blackheart the fictional demon in the Marvel Comics Universe,  the character  created by Ann Nocenti and John Romita, Jr.,

To me it is the image of rebirth that ties to the Greek mythology of Persephone: As the Goddess of Springtime and Rebirth, she is eternally connected to the cycles of the earth, which lies barren in her absence and bloom again each spring with her return. And her initiatory experience in the realm of the dead is such a powerful experience that it changes her life forever. It is after this transformation that we remember her most for her role as the Greek Goddess of the Underworld.

Out of the tunnel of darkness comes light.  Note the sparkle on this black drusy quartz necklace.  This gold charm is created to represent the light at the end of darkness, the glimmer and hint of a better future as spring begins her awakening. 

Sparkle, glimmer and begin anew!  Ahhhh, spring is in the air.