Two Stone-Like Fashion Necklaces

1 necklace has a makers hang tag. I think it is the brand You and I. (or something like that) It has a lobster claw closures. The yellow square beads are cold to the touch. The other necklace is a multi-strand illusion style chip stone-like beads. I don't know the maker or materials. I put it with the other necklace to add value & offer versatility.