Don’t worry if any priest seems surprised if you ask him to bless a religious article. It’s just that many people don’t think of these things today. Ask him anyway, as you do…as you will read, it is in accordance with the teachings of the Church…and he won’t refuse. If the rosary is blessed, all parts are blessed, but you can hand all to him at the same time without their being attached if you wish.
Sacramentals such as blessed medals, crosses, and rosaries are reminders of the Lord and His salvation, and our heavenly family. They inspire us and encourage to cooperate with graces of trust in God, and of prayer.
The Catechism of the Catholic Church says:
'1668 Sacramentals are instituted for the sanctification of certain ministries of the Church, certain states of life, a great variety of circumstances in Christian life, and the use of many things helpful to man. In accordance with bishops’ pastoral decisions, they can also respond to the needs, culture, and special history of the Christian people of a particular region or time. They always include a prayer, often accompanied by a specific sign, such as the laying on of hands, the sign of the cross, or the sprinkling of holy water (which recalls Baptism).
1670 Sacramentals do not confer the grace of the Holy Spirit in the way that the sacraments do, but by the Church’s prayer, they prepare us to receive grace and dispose us to cooperate with it. “For well-disposed members of the faithful, the liturgy of the sacraments and sacramentals sanctifies almost every event of their lives with the divine grace which flows from the Paschal mystery of the Passion, Death, and Resurrection of Christ. From this source all sacraments and sacramentals draw their power. There is scarcely any proper use of material things which cannot be thus directed toward the sanctification of men and the praise of God.”