1- A necklace suggest a special object, and thus translates into special qualities or attributes. There is a richness to be acknowledged. This may be of feeling or of emotion.
An old interpretation of a man giving a woman a necklace was that he would soon ask for her hand in marriage.
2- Necklaces arose from the wearing of a chain of officc and therefore in dreams suggests a dignity or honour which has been conferred on the wearer.
3- The necklace is an acknowledgement of honour and power.
The rosary is a special kind of necklace which aids one in prayer.