I love opals! They have such a dream-like quality when not overpowered by excessive gold settings. They remind me of where the sea laps the shore, and of the refracted light as the waves break onto the sand.
OPAL: " For in them. u shall c the living fire of the ruby. the glorious purple of the amethyst. & the sea-green of the emerald. all glittering in an incredible mixture of light." ~Roman Pliny, the Elder on Opal, Century AD.