The Immaculate Heart:
The symbol of the Immaculate Heart , sometimes with a sword piercing it, is in reference to Simeon's prophecy in St. Luke, Chapter 32, Verse 35:
And thine own soul a sword shall pierce, that out of many hearts, thoughts may be revealed.
Other times the Lily replaces the Sword, as it does here.
The Sword is for sorrow, the Lily for purity and joy. Long ago, a circle of thorns used to replace the roses.
Mexican Miracle Charms - Devoted people in Mexico, go to church and attach little metal charms to an image of a chosen Saint to ask for protection or help, these small metal charms come in many shapes depending on each person needs. The Sacred Heart of Jesus and the Immaculate Heart of Mary are traditional Roman Catholic devotional images, a person in love and in need of help with a relationship or a heart condition would choose a heart shaped charm to ask for help.