The pendant must be attuned to one of the player's five lowest skills when it is first equipped. All experience gained in that skill is then multiplied by 1.5 as long as the pendant has not depleted. It continues to work even if that skill is no longer one of the five lowest. The amulet can be reattuned to a different skill at any time. Unlike the Pendant of Skill, the Lovestruck and Heartbreak pendants do stack with experience-boosting sets and proto-tools.