A Water object

Hi, I am trying to simulate a necklace flowing through water getting caught on something and finally falling hitting the sea bed. Q1. How can i make the necklace flexable ? I am trying to use wire object atm. Q2. Is there a way to put weight on the points so one end falls faster ? Q3. with the wire object used for the chain of the necklace is there a way to stop it flattening itself as it hits the static object ? If someone can put me in the right direction i would be grateful. Lyonz Wat

Actually, thinking about it you could also go the other way around: First make your jewels and the connected them via spring constraints with fixed length. This would avoid the slightly awkward wire-constraint-rbd solution. You'd still have to use the complicated constraint setup though and extracting the curve of the necklace out of it may be cumbersome, especially if the chain breaks. However, the hole thing may be more elegant and stable if you don't want things to break too much.