Two-strand (one in bigger beads and the other in skinnier beads) or multi-strand are commonly seen nowadays, especially for fashion jewelry . I guess because of the "cheap" material used, to add some more "weight" or value and create more visual complexity, pairing up or teaming up is a natural choice of solution.
Ribbon tied-back closure is catching on. We can see that trend on shoe style as well. But it's not "traditional" or practical for say everyday office setting. It adds casualness and femininity. The look goes well with beachwear or weekend fun.
