Compared to common opal, which is usually one color, black opal exhibits many different colors contrasted by a dark body tone. Frederick: It's simply the most stunning gemstone on the planet.

This is due to Bragg diffraction off the different layers in the opal, with different reflected photons interferring with each other. Electronics company posts bill with over $36K tariff charge ...

Abbey Ellis was curled up on the couch of her family home in Melbourne's outer north as the Opals won their way on to the podium at last year's Olympics. Nine months on, when Australia faces New ...