Each of these blue necklaces has a different flavor. The first icy periwinkle blue and silver links has a space age feel, like something in the old star trek shows. I think partly because if the odd placement of the holes in the rectangular silver link components.
The second one with two strand of many different indian glass luster beads has and organic or beachy look. The pale blue dagger beads remind me of wings.
The third has large steely blue glass pendant beads and lots of end caps and silver adding up to a more elegant design. The first and third necklaces are wire work and the second is strung beads.