Quote - Do you think that the same technique can be used for necklaces?

I'm not sure, but probably not for the gravity stuff, though the geometry swapping part would work OK. There are a lot more difficulties to overcome with a necklace, and and using Point At for gravity. With earrings, they generally have a lot of clear space to swing around in before they hit anything, where as a necklace lays against the chest and neck. The chain of the earrings is just a rigid object (with a couple of morphs that can be applied manually to give it a slight bend). A necklace needs a chain made of parts, so that the individual links can move. But I think it would be very hard, if not impossible, to use Point at to control such a chain in a useful way. And there is a problem with Point At, it does not respect forced limits, if it did it might be much more useful.

I think dynamic is probably a much better way to go with necklaces. There again, there may be other ways. Cage can do some very amazing things with Python script and chains. And whilst this seems like an insurmountable problem, if an insurmountable problem can be surmounted, Cage is the man to do it!