Hello all. 
I know this should be pretty simple. I created some earrings as props in Blender and imported them into iClone. Attached them to ears in iClone ( technically they are positioned on the ear but "attached' to the head. 

Either way, they move with the head fine during animation. But I need them to sway.  I went to the modify panel and to Physics > Activate Physics ... but I'm not sure what the right combination of features are to get it working. I need to obviously constrain the topmost point of each earring to the corresponding "ear lobes" of the actor. .  Mind you, these are earrings that I created . I did not purchase them. 

Any advice would be appreciated ! Thanks.