Here is an example from the game if you haven't seen it:
I could use some help to break it down what the gems are doing and why do the look so nice and smooth when moving.
I just love how bouncy they are especially when you destroy a gem vein and the room is filled with the gems.
Currently I have the items as physics objects w/ 100% elasticity and when they hit the ground they lose 20% of their elasticity. It still does't make them look right at all...