New video uploaded, but this time about a minute and a half. A few tests of the latest earring, using both diamond and rectangular meshes for the underlying dynamics. This time I did a bit of video editing and put several 3 second animations together with some explanatory words and pictures.
Increasing the cloth density seemed to fix both the diamond-based mesh's overenthusiastic bounciness and the rectangle-based mesh's refusal to move.
Not sure how generic that observation will be. Scale may have a big impact (i.e. earring as opposed to anchor chain). The fact that both ends of the chain are fixed may also have a big impact.