black opal exhibits many different colors contrasted by a dark body tone. Frederick: It's simply the most stunning gemstone on the planet. It's just remarkably beautiful. You can put the thing ...

pink opal, onyx, carnelian, and more. The result is an elegant, unmistakably feminine collection with just the right dose of color and sparkle. “My father, Karl Scheufele, introduced exquisite ...

but when packed together in certain configurations can give rise to flashes of color. This is due to Bragg diffraction off the different layers in the opal, with different reflected photons ...

The dial’s vivid color is echoed by ruby root beads in ... each featuring a different ornamental stone: blue opal veined with iridescent green, warm brown tiger’s eye, vivid green meteorite ...