 Critics do contend that a stone can potentially be dislodged from a tension setting if it is hit hard enough or if the setting is damaged to the point where its spring loading is compromised.Tension manufacturers partially agree with this statement, warning their customers that stones can be lost if the setting suffers a blunt force impact that damages the spring-loading, but they also point out that no stone has ever been lost as a result of a manufacturing defect.There is a risk that the setting can be compromised by a high impact.