I call this the puzzle necklace, because it was like putting a puzzle together stringing this. These are coral stick beads which, I believe, have been dyed. As you can see, not one is the same in shape/length. They are reddish brown and light green. I just tried to mix up the different lengths of the sticks next to each other. You really can't go wrong since these coral sticks have so much personality just the way they are; and that's why I didn't try to mix any other beads with these. These are not the endangered red corals, by the way. You can really have fun wearing this necklace, it is certainly "a looker"!