Cubic Zirconium Silver Tie Tack. 1 Ct cubic zirconium in silver platted setting tie tack. A tie tack is useful in keeping a tie from getting caught in things. It should be placed in the center of the tie. It can be worn anywhere from 2/3 of the way down on the tie to 3/4 of the way down. Decide on the type of tie tack wanted. Think about matching it to the metal colors of other jewelry items like cuff links, rings or watches.