Brooch | Harry Winston. 32 ct black opal from Lightning Ridge (Australia), accented with sapphires, rubies, emeralds, and diamonds set in
Lilly Fitzgerald Opal Pendant - I'm not much on jewelry, but this is beautiful.
Aquamarine Diamond Gold Pendant Brooch Pin and Pendant | From a unique collection of vintage drop necklaces at http://www.1stdibs.com/jewelry/necklaces/drop-necklaces/
Art Nouveau Lapis lazuli, natural pearl, and gold pendant