Here are some examples that I love:
|Georgian Amethyst Riviere Necklace|
|Tourmaline Riviere Necklace|
|Georgian Harlequin Necklace|
Well, my one is just in the planning stages, but I have been collecting the pieces (gradually buying them) from an Etsy sea glass seller. I am in love with sea glass - to me it is just as beautiful as precious stones, and I especially love the smoky grey shades.
Not precious, not faceted but I think it will still qualify once it is finished (it is graduated after all) - just one of the many projects I'm planning for 2013:
|Shades of grey sea glass - click for actual size (approx)|