I like having visible metal in jewellery, because it often brightens up a piece and makes the accompanying beads really stand out.  I picked up these silver tubes at a local beading store back in the fall and wanted to make a fun, casual necklace with them.  I chose some bright, teal blue and green crystal rondelles to go with them, and they look quite fun together.  There are some small silver seed beads to bookend the crystals, as the size of the beads’ holes is about the same size as the tubes.