Holy Dialogue (Pravachana Vakhyalu):
February 03, 2014: According to Hindu customs, mangalsutra symbolizes the inseparable bond between a husband and a wife. In Hindu marriages the husband ties the mangalsutra to the neck of the bride uttering- “May you live long by wearing this sacred Mangalsutra, the reason of my life”. It is believed that the wearing of the mangalsutra enhances the well-being of husband and family. It is also considered that the black beads present in the mangalsutra protect the marriage and the family from all evils. In certain local cultures, the groom ties the first of the three knots while his sisters tie the rest. Three knots symbolize three different aspects of a married woman - the first knot represents her submission to her husband, the second to her parents and the third represents her respect for God.
It is also considered as the symbol of good luck. Wearing it brings good fortune. A woman parts with it only after her husband’s demise. A peacock is a symbol of a woman’s love for her husband.. It is believed that one made in gold is superior, since gold helps increase energy levels in the body and is symbol of prosperity.
--- Excerpts from Sri Chaganti koteswara rao’s preaching