When you get a new Rosary, take it to a priest and have it blessed. Remember, the blessing of the Church on your Rosary makes it a sacramental.
There are various kinds of blessings for Rosaries and each carries with it a different kind of Indulgence. One blessing is called the Dominican Blessing, for St. Dominic who received the Rosary from Our Lady. This blessing enables one to gain another 100 days Indulgence on each bead.
To foster the love of and universal use of the Rosary, the popes have given priests the power to bless the Rosary, and when they do each bead carries with it an Indulgence.
Another Indulgence is called the Apostolic Indulgence. This is the blessing of the Pope that is given through a duly authorized priest. One who is dying and has such a rosary or crucifix, and tried his best to confess and receive Holy Communion, and if this was not possible, is sorry for his sins and with a contrite heart invokes the name of Jesus may gain a plenary indulgence at the hour of death.
Another one is called the Crosier Indulgence, which makes us think of the cross on the Rosary. This blessing grants an indulgence of five hundred days for each Our Father and Hail Mary that we say on the beads, even though we say only a few Hail Mary’s on it, instead of the whole rosary.
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Does your rosary have all these valuable blessings? One may gain all the above blessings on the same rosary and crucifix. However, one and the same blessing will not avail to gain all the indulgences mentioned unless expressly declared. Ask your priest about this. Remember: a blessed Rosary is a Sacramental; and Indulgences not only help you, but can be applied to the Poor Souls in Purgatory as well.