Choker Necklace in rainbow Swarovski Crystals.  See Matching Bracelet: B114 & Earrings: E193 - all at the Arts Council.
This is a choker style necklace so more than likely you will need to have it custom made. This particular necklace is $100.00. I personally like my necklaces close to my neck in a choker style but any style can be changed to be the length you are comfortable with. The price will depend on the amount of stones/beads per necklace.

This particular necklace has a beautiful amethyst square crystal clasp. Swarovski bicones in light rose, rose, fuchsia, violet, light amethyst, amethyst, aquamarine, light sapphire, sapphire, crysolite, peridot, emerald, jonquil, topaz, padpardscha, hyacinth, ruby, garnet, and light siam. This necklace is almost 14" long.