Beaded Gemstone Necklace - I like the seed bead technique on the sides, but not the big gems in the middle. I'd probably do just the seed beads, graduating the size to make a Cleopatra-type collar, with maybe one big gem in the middle as a focal.
If you like beaded necklace designs with a tribal element, you'll adore this Asymmetrical Donut Bead Necklace. It has a fun beachy vibe that just screams summer! Throw this bold piece on over your bathing suit coverup, and hit the sand!